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Mean ± SEM for number (a) and duration (c) of non-rapid eye movement (NREM) sleep bouts and number (b) and duration (d) of rapid eye movement (REM) sleep bouts over a 24-h period in Townes mice with the sickle cell phenotype SS (n = 6) and Townes mice with the sickle cell trait AS (n = 6). Statistical differences determined by two-tailed unpaired Student’s t test
