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

You like big-budget rom-coms, so you know the drill: Opposites attract. Those two characters who can't stand each other in act one? Chasing each other through an airport by act three. Well...apparently science does not go to the movies. In fact, according to a new study, genetic similarity may determine who's going to partner with whom—especially if the similarity is in what kind of psychiatric disorder you have. 
  
 Here's the approach: A study in this month's issue of JAMA Psychiatry looked at 707,263 Swedish people, all with at least one psychiatric disease: ADHD, schizophrenia, bipolar disorder, anxiety and depression, obsessive compulsive disorder, autism spectrum disorders, and others. The study also looked at individuals with physical ailments—diabetes, Crohn's disease, rheumatoid arthritis, and so on. (How heritable all these things are is open for debate—they cross multiple genes and environment plays a factor. But all have some genetic component.) And for every person with either a physical or psychological condition, five unaffected subjects were included as control.1 
  
 From there, the researchers looked at people's romantic entanglements over 18 months. People with psychiatric disorders were more likely to end up with someone with a psychiatric disorder, and the chances were higher (marginally) that they'd share the same illness. "In the few studies that have examined partner correlations at the level of diagnoses, the methods have generally relied on small volunteer samples or self/informant reports," says Ashley Nordsletten, a neuroscientist at the Karolinska Institute in Sweden. This one, though, had clinical diagnoses across the board, working from anonymized medical histories on, as Nordsletten says, "psychiatric conditions that varied in terms of age of onset, nature and severity of symptoms, as well as population prevalence." 
  
 This doesn't mean that your future spouse's name is spelled out in the As, Ts, Cs, and Gs of your genetic code. Nordsletten's numbers are significant, but the effect is tiny. Which is probably fine, because sharing the same psychiatric disorder might not necessarily convey compatibility. Successful relationships—the ones in which couples rate themselves as more "satisfied"—tend to feature partners with complementary, not similar traits. "An example of that kind of trait would be dominance," wrote Vanessa Bohns, a psychologist at Cornell who studies compatibility within relationships, in an email. "Otherwise you’re either going to be stepping all over each other as you go about pursuing your goals (if both of you wants to be the boss) or you’ll never get started on pursuing them (if no one takes the lead)." 
  
 On the other hand, Nordsletten's criterion for a successful relationship isn't happiness, but fertility. Because many Swedish people co-habitate rather than legally marry, the study focused on people who were either married or had kids. According to Nordsletten, the birth of a child was just about the only viable way to determine if the couples were really "mated." Given the study's focus on individuals who have genetically-linked psychiatric disorders, the psychiatric future of those kids is the really interesting part. 
  
 The idea that people with certain psychiatric disorders having kids might be perpetuate or increase the incidence of those conditions isn't a new one. In 2001, WIRED took a deep dive into the surging rates of autism and Asperger's syndrome in Silicon Valley. Writer Steve Silberman wondered whether the Bay Area, home of tech's best and brightest and (sometimes) most spectrum-y, was an uncontrolled, accidental experiment in amplifying the expression of autism spectrum disorders. The question is still in play. According to a report by the San Francisco Bay Area Autism Society, the number of autism cases seen by the California Department of Developmental Services is 15 times as high today as it was in 1990. 
  
 But this isn't some weird attempt to justify controlling who marries whom. Nordsletten hopes that her research will help clarify the ways that these disorders are transmitted from parent to child, and allow caregivers to better manage these often ill-understood conditions. So that means the next step is to see how the partners' diagnoses manifest in their genotypes. And after that? "Following up with the children of these couples would also be a natural companion to this work," Nordsletten says. Maybe science doesn't watch movies, but that does sound like a pretty good sequel. 
  
 1UPDATE: This story has been updated to correct the representation of the study’s methods. ||||| People with psychiatric disorders may be likely to marry and have children with other people who also have psychiatric disorders, according to a new study from Sweden. 
  
 The study did not examine why people with psychiatric conditions, such as schizophrenia and depression, may tend to mate with other people with such conditions, and therefore, the mechanisms behind this phenomenon are not clear, said Ashley E. Nordsletten, a co-author of the study and a postdoctoral research fellow at Karolinska Institutet in Stockholm. 
  
 But one possible reason is that people may simply select partners who share certain traits with them, she told Live Science. 
  
 In the study, the researchers looked at the health data from about 700,000 people who were admitted to Swedish hospitals between 1973 and 2009. This population included more than 70,000 people with schizophrenia, people with 10 other major psychiatric disorders, and people with chronic physical illnesses such as Crohn's disease, diabetes or multiple sclerosis. 
  
 The researchers also reviewed data from marital records and other sources, to look at mating patterns among the people with psychiatric conditions, and among those with physical illnesses. [5 Controversial Mental Health Treatments] 
  
 It turned out that people with psychiatric disorders were more likely to marry and have children with people with either the same disorder as they had or a different psychiatric disorder, than they were to marry and have children with people without psychiatric disorders. 
  
 However, the researchers did not find the same mating pattern among people with physical illnesses. For example, people with Crohn's disease were not more likely to marry or have children with other people who had Crohn's disease or people who had another serious physical illness, such as diabetes. 
  
 The new study shows that "people with severe psychiatric disorders tend to mate with each other, and are less likely to mate with people without psychiatric disorders," said Scott Wetzler, a psychologist and behavioral scientist at Montefiore Health System in New York who was not involved in the study. 
  
 People with severe psychiatric disorders tend to have a very hard time establishing social relationships with others in general, and people without psychiatric conditions are less willing to marry people with such conditions, Wetzler told Live Science. These two factors also might help to explain the new results, he said. 
  
 Though the exact reasons behind the new findings remain unclear, the results are "very important to consider when doing future genetic research and when thinking about the higher incidence of psychiatric illness running in families," said Dr. Matthew Lorber, acting director of child and adolescent psychiatry at Lenox Hill Hospital in New York City, who was not involved in the study. 
  
 Wetzler agreed, saying that if two people who both have psychiatric conditions have a child together, the risk that the child also having the condition is increased. 
  
 The new study was published today (Feb. 24) in the journal JAMA Psychiatry. 
  
 Follow Agata Blaszczak-Boxe on Twitter. Follow Live Science @livescience, Facebook & Google+. Originally published on Live Science. ||||| Importance Psychiatric disorders are heritable, polygenic traits, which often share risk alleles and for which nonrandom mating has been suggested. However, despite the potential etiological implications, the scale of nonrandom mating within and across major psychiatric conditions remains unclear. 
  
 Objective To quantify the nature and extent of nonrandom mating within and across a broad range of psychiatric conditions at the population level. 
  
 Design, Setting, and Participants Population-based cohort using Swedish population registers. Participants were all Swedish residents with a psychiatric diagnosis of interest (attention-deficit/hyperactivity disorder, autism spectrum disorder, schizophrenia, bipolar disorder, major depression, generalized anxiety disorder, agoraphobia, social phobia, obsessive-compulsive disorder, anorexia, or substance abuse), along with their mates. Individuals with select nonpsychiatric disorders (Crohn’s disease, type 1 and type 2 diabetes mellitus, multiple sclerosis, or rheumatoid arthritis) were included for comparison. General population samples were also derived and matched 1:5 with each case proband. Inpatient and outpatient diagnostic data were derived from the Swedish National Patient Register (1973-2009), with analyses conducted between June 2014 and May 2015. 
  
 Main Outcomes and Measures Correlation in the diagnostic status of mates both within and across disorders. Conditional logistic regression was used to quantify the odds of each diagnosis in the mates of cases relative to matched population controls. 
  
 Results Across cohorts, data corresponded to 707 263 unique case individuals, with women constituting 45.7% of the full population. Positive correlations in diagnostic status were evident between mates. Within-disorder correlations were marginally higher (range, 0.11-0.48) than cross-disorder correlations (range, 0.01-0.42). Relative to matched populations, the odds of psychiatric case probands having an affected mate were significantly elevated. Differences in the magnitude of observed relationships were apparent by disorder (odds ratio range, 0.8-11.4). The number of comorbidities in a case proband was associated with the proportion of affected mates. These relationships were not apparent or weaker in magnitude among nonpsychiatric conditions (correlation range, −0.03 to 0.17). 
  
 Conclusions and Relevance Nonrandom mating is evident in psychiatric populations both within specific disorders and across the spectrum of psychiatric conditions. This phenomenon may hold important implications for how we understand the familial transmission of these disorders and for psychiatric genetic research. |||||
When looking for love, people with psychiatric disorders tend to look toward their own, one new study suggests. Researchers from the Karolinska Institute in Sweden report in JAMA Psychiatry that they combed the health histories of 707,263 people admitted to hospitals in Sweden between 1973 and 2009 and who had at least one psychiatric disorder—70,000 alone had schizophrenia, while 10 other major psychiatric disorders were also represented. Researchers also noted people with certain physical illnesses such as diabetes and MS. What they found is that those with psychiatric disorders are both far more likely to marry someone who also has a disorder as well as have children with them—a finding that did not carry over with people with physical illnesses. What drives the matchmaking? A psychologist tells Live Science that not only do people with psychiatric disorders often have a harder time building relationships, but people without such disorders are often less willing to accept partners with them. But, as Wired notes: "This doesn’t mean that your future spouse’s name is spelled out in the As, Ts, Cs, and Gs of your genetic code. [These] numbers are significant, but the effect is tiny. Which is probably fine, because sharing the same psychiatric disorder might not necessarily convey compatibility." The researchers say a "natural companion" to this enormous trove of data is the psychiatric future of the offspring of these couples.