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 .
length_constraints:number_words startend:quotation detectable_format:number_highlighted_sections keywords:frequency keywords:forbidden_words change_case:english_lowercase length_constraints:number_paragraphs
at least
less than
relationships
health
Keep your entire response at least 13 words or less. Your answer need to be wrapped in double quotes Make sure to highlight at least 2 sections in your answer with markdown, i.e. use *highlighted section* Mention the word "relationships" for less than 2 times The words health cannot be in the response All letters in your response must be lower case letters Please reply in details, and include exactly 3 paragraphs. Separate the paragraphs with ***