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Cancer-free survival rates of patients in Inso-Hyp, Inso-NonHyp, NonInso-Hyp, and NonInso-NonHyp groups. Inso-Hyp, patients with insomnia and sedative-hypnotic prescriptions; Inso-NonHyp, patients with insomnia and without sedative-hypnotic prescriptions; NonInso-Hyp, patients with sedative-hypnotics and without insomnia; NonInso-NonHyp, patients with neither insomnia nor sedative-hypnotic prescriptions
