TY - GEN AU - Taillard,Jacques AU - Philip,Pierre AU - Chastang,Jean-François AU - Bioulac,Bernard TI - Validation of Horne and Ostberg morningness-eveningness questionnaire in a middle-aged population of French workers SN - 0748-7304 PY - 2004///0923 KW - Biological Clocks KW - physiology KW - Chronobiology Phenomena KW - Circadian Rhythm KW - Cluster Analysis KW - France KW - Humans KW - Middle Aged KW - Photoperiod KW - Reproducibility of Results KW - Sleep KW - Surveys and Questionnaires KW - Wakefulness N1 - Publication Type: Journal Article UR - https://doi.org/10.1177/0748730403259849 ER -