label: Instruct about factors (e.g., physiological, psychological, lifestyle, frequent work shift changes, rapid time zone changes, excessively long work hours, other environmental factors) that contribute to sleep pattern disturbances
label_lc: instruct about factors (e.g., physiological, psychological, lifestyle, frequent work shift changes, rapid time zone changes, excessively long work hours, other environmental factors) that contribute to sleep pattern disturbances