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