In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

She was ill-tempered, moody, vain and insecure. 
  
 She berated her famous husband in public, went on shopping binges and made enemies. She was called “the hell cat” by some of the staff at the White House. 
  
 First lady Mary Todd Lincoln, who also experienced the deaths of three of her children and the assassination of her husband, was a troubled figure in 19th-century American history. Later in life, she was temporarily institutionalized. 
  
 On Tuesday, a California cardiologist advanced what he said was a fresh theory to explain some of her behavior: She suffered from an ailment called “pernicious anemia,” which is related to a vitamin B-12 deficiency. 
  
 John G. Sotos, who has also studied the medical history of Abraham Lincoln, detailed his theory in the journal Perspectives in Biology and Medicine, published by the Johns Hopkins University Press. 
  
 Mary Todd Lincoln, wife of President Abraham Lincoln, wore this dress for his inauguration in 1861. (Library of Congress/Getty Images) 
  
 [Abraham Lincoln — beloved, scrutinized and exhumed] 
  
 Mary Lincoln’s litany of ailments and complaints was often thought to be, in part, those of a hypochondriac, Sotos wrote. 
  
 “A diagnosis of chronic multisystem pernicious anemia would clarify [her conduct] as First Lady and widow, and illuminate challenges faced by her husband,” he wrote. 
  
 The ailment begins with an autoimmune attack on the stomach, which then stops making the chemical that helps absorb ­dietary B-12, Sotos explained in an email. 
  
 “The symptoms of deficiency appear months to years later, after the body’s storehouse of B12 is depleted, and over time, symptoms arise from more and more organs,” he said. 
  
 It’s not clear how Mary Lincoln got it. 
  
 “It is likely she was predisposed to it genetically,” Sotos said. “Some people have suspected that the same bacterium that causes ulcers . . . also triggers the autoimmune attack on the stomach, but the question is far from settled.” 
  
 Mary’s physical afflictions included fevers, headaches, fatigue, a rapid heart rate, progressive weakness, a sallow complexion and tingling of the skin, he wrote. All are consistent with vitamin B-12 deficiency. 
  
 And her irritability, delusions and hallucinations also are in line with such a deficiency, he argued. 
  
 “Mary Todd Lincoln ranks among the most detested public women in American history,” ­biographer Jean H. Baker wrote in 1987. “And Americans . . . have unshakable opinions about Mary Lincoln’s failings.” 
  
 But Sotos contended that “she was simply a woman with a biochemically injured mind struggling in a complicated, ­relentlessly demanding environment.” 
  
 A native of Lexington, Ky., Mary Todd and the budding politician and lawyer Abraham Lincoln were married in 1842 in Springfield, Ill., according to Baker’s biography. 
  
 She and her family lived briefly in Washington after her husband was elected to his single term in Congress in 1846 and returned after he was elected president in 1860. 
  
 By then, one of her children had died in Springfield, and another would die in the White House in 1862. 
  
 It was while she was first lady that her questionable conduct emerged publicly. 
  
 She spent lavishly on White House furnishings, shelling out huge sums for china, wallpaper, carpets and furniture. She spent the government’s $20,000 four-year allowance for White House refurbishing in one year, Baker wrote. 
  
 She also spent heavily on clothing and jewelry, seeking to emulate European royalty, even as the United States was in the grip of the Civil War. 
  
 After her 11-year-old son, ­Willie, died on Feb. 20, 1862, Mary took to her bed for three weeks, overcome with grief, ­Baker wrote. 
  
 Later, she dabbled in spiritualism and attended seances in the White House to try to contact her departed son. She believed that he and his deceased brother, ­Eddie, appeared to her in her room at night. 
  
 Meanwhile, her jealousies tormented her. 
  
 Three weeks before her husband was assassinated, she attended an Army review with him in Virginia. Arriving late in a wagon, she became enraged that the wife of a prominent general was riding on horseback beside the president. 
  
 Mary confronted her husband and began to rail at him in front of Army officers, according to Baker. 
  
 “He bore it as Christ might have done, with an expression of pain and sadness that cut one to the heart,” an officer wrote later. “He pleaded with eyes and tones, till she turned on him like a tigress, and then he walked away.” 
  
 She demanded that the general be fired for his wife’s offense. He wasn’t. 
  
 Calamity struck again when Lincoln was assassinated while sitting beside his wife in Ford’s Theatre on April 14, 1865, and she was unhinged anew. 
  
 Sotos wrote that although Mary Lincoln left few surviving medical records, he amassed a compendium of hundreds of letters and historical sources related to her health. 
  
 After the assassination, she moved to Chicago with her surviving sons, Robert and Tad, ­Sotos wrote. But in 1871, Tad Lincoln died there at the age of 18, further afflicting his mother. 
  
 In the years after that, Mary suffered from auditory hallucinations, paranoia and delusions. 
  
 In 1875, Robert, worried about her well-being, sought a warrant for her arrest on the grounds of insanity. After a court hearing, she was ruled insane and committed to an asylum outside Chicago, where she was confined for three months. 
  
 After her release, she went to France for four years, then moved in with her sister in Springfield. She died there on July 16, 1882, at the age of 63. 
  
 Doctors in those times knew almost nothing about pernicious anemia, and until the early 20th century it was frequently fatal, according to Sotos. 
  
 Nowadays it can be spotted early through routine blood tests, he said. It is treated with B-12 pills or shots. 
  
 Mary Lincoln’s misfortune “was living before treatment was available,” Sotos wrote, “and before physicians could make a diagnosis that would have prevented 150 years of misunderstanding about her.” ||||| Mary Todd Lincoln had a lot of tragedy in her life. She lost two young children -- and, of course, was sitting next to President Lincoln when he was assassinated. 
  
 All of that contributed to years of depression, but now a medical expert believes there was a physical cause for her mental struggles. 
  
 History has not been kind to the wife of our 16th president. She was known to be a tempestuous, unpredictable force, and her son eventually had her committed. Sally Field's 2012 portrayal of Mary Todd showed a fierce and sharp-tongued first lady. 
  
 "You think I'm ignorant of what you're up to because you haven't discussed this scheme with me as you ought to have done," she said in one scene. "When have I ever been so easily bamboozled?" 
  
 But Dr. John Sotos, a physician and medical historian, says the famously fiery first lady was not only misunderstood - but misdiagnosed. Sotos puts forth a new theory about Mary Todd Lincoln -- her erratic behavior was caused by a condition called pernicious anemia. 
  
 "Pernicious anemia is an autoimmune disease that starts in the stomach and that impairs the body's ability to absorb food efficiently," Sotos said. "And as a result, the person becomes B12 deficient eventually, and that causes lots of problems in every organ of the body." 
  
 It was a fatal illness until treatment was discovered decades after her death. The disease can lead to many of the symptoms exhibited by Mary Todd Lincoln: a sore mouth, pale skin, difficulty walking and psychiatric problems. It can also cause swelling. 
  
 "The puffiness is not in a way that would occur with just an accumulation of fat," Sotos said. 
  
 Today, the disease can be picked up on a simple blood test and easily treated with B12 supplements. 
  
 "She had a sick brain and was doing the best that she could in a very complicated, relentlessly demanding environment," Sotos said. "And I think to have done as well as she did with the kind of handicaps that she had, I think that deserves admiration." ||||| Could pernicious anemia, a disease caused by a vitamin B12 deficiency, have explained the many strange behaviors of Mary Todd Lincoln? 
  
 She was not exactly a model first lady. Historians have had a field day describing her violent temper, wild shopping sprees (she owned 300 pairs of kid gloves), depressed moods and all-consuming fears of burglars, storms and poverty. Late in life, at her son’s urging, she was committed to a mental hospital for several months. 
  
 Plenty of theories, none proven, have been floated. She was bipolar. She had syphilis or that well known cause of feminine madness, menstrual trouble. She was spoiled and narcissistic. She never recovered from a road accident in which her head hit a rock. She lost her mind grieving the deaths of three of her four sons and her husband’s assassination. 
  
 The latest addition to the list of possible diagnoses comes from Dr. John G. Sotos, a cardiologist, technology executive at Intel and one of the medical consultants who helped dream up the mystery diseases that afflicted patients on the television show “House.” ||||| Abstract 
  
 To date, no single diagnosis has unified the psychiatric illness and the numerous poorly defined physical complaints that Mary Lincoln (née Todd, 1818–1882) suffered in adulthood. Here, I show that her physical ailments spanned 30 years and included sore mouth, pallor, paresthesias, the Lhermitte symptom, fever, headaches, fatigue, resting tachycardia, edema, episodic weight loss, progressive weakness, ataxia, and visual impairment. Long thought hypochondriacal, these findings, plus their time course and her psychopathology (irritability, delusions, hallucinations, with preserved clarity), are all consistent with vitamin B12 deficiency. Pernicious anemia most probably caused this deficiency: she lacked risk factors for other causes, and her consanguineous parents both derived from a region of Scotland having a high incidence of pernicious anemia. A diagnosis of chronic multisystem pernicious anemia would clarify the conduct of Mary Lincoln as First Lady and widow, and illuminate challenges faced by her husband, President Abraham Lincoln. Her case highlights many forgotten features of the natural history of untreated pernicious anemia and is unique in the medical literature in demonstrating such a course extending over a lifetime. |||||
She's been described as perhaps the most troubled first lady to set foot in the White House, with fearsome moods, depression, and paranoia. Now a doctor says he may have uncovered the secret to Mary Todd Lincoln's behavior: a vitamin deficiency. Interestingly, this latest theory in Perspectives in Biology and Medicine comes from cardiologist John G. Sotos, who helped come up with all those strange diseases decoded on the TV show House, per the New York Times. In what might as well be a plot from the show, Sotos was researching Abraham Lincoln—whom he suspects had a genetic syndrome that led to cancer—when he found an 1852 letter describing Mrs. Lincoln's sore mouth and set out to discover what ailed her. His theory? She suffered from pernicious anemia, an autoimmune disease "that impairs the body's ability to absorb food efficiently," says Sotos, per CBS News. Sufferers become B12-deficient, and a lack of B12 can cause a wide range of health problems—including a sore tongue. It can wreak havoc on the entire body over time, reports the Washington Post. "You get a long list of symptoms," from headaches to irritability and hallucinations, Sotos says. "Mary had just about all of them." The first lady—who spent months in a mental hospital in later life—also had "a wide face, wide jaw, and widely separated blue eyes," as do many with pernicious anemia, he writes. What's more, her ancestors came from an area of Scotland where the disease was once prevalent. One doctor calls Sotos' study "ingenious," though there's no proof he's correct. But Sotos simply hopes historians cut Mrs. Lincoln some slack. "To have done as well as she did with the kind of handicaps that she had, I think that deserves admiration." (Someone stole Abraham Lincoln's hand.)