RT Article T1 The Pittsburgh Sleep Quality Index: A New Instrument for Psychiatric Practice and Research JF Psychiatry research VO 28 SP 193 OP 213 A1 Buysse, D. A2 Kupfer, D. A2 Berman, S. A2 Monk, Thelonious 1917-1982 A2 Reynolds, C. LA English YR 1989 UL https://krimdok.uni-tuebingen.de/Record/1912650975 DO 10.1016/0165-1781(89)90047-4