Research using Rogers' conceptual system: development of a testable theorem.
D000328:Adult; D003210:Concept Formation; D005260:Female; D006760:Hospitalization; D006778:Hospitals, Psychiatric; D006801:Humans; D008297:Male; D008960:Models, Psychological; D009729:Nursing; D010507:Periodicity; D012107:Research Design; D012890:Sleep; D014851:Wakefulness; D014940:Work Schedule Tolerance