In this task, you will be given sentences in which you have to recognize the name of the body cells. A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Although there might be several correct answers, you need to write one of them. 
 input :  Sickle cell disease : continuous arterial spin - labeling perfusion MR imaging in children .
detectable_format:number_highlighted_sections startend:quotation keywords:frequency change_case:english_lowercase length_constraints:number_words keywords:forbidden_words length_constraints:number_paragraphs
less than
relationships
at least
health
Make sure to highlight at least 2 sections in your answer with markdown, i.e. use *highlighted section* Your answer need to be wrapped in double quotes Mention the word "relationships" for less than 2 times All letters in your response must be lower case letters Keep your entire response at least 13 words or less. The words health cannot be in the response Please reply in details, and include exactly 3 paragraphs. Separate the paragraphs with ***