Disengagement among professors.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001290:Attitude; D005178:Faculty; D006801:Humans; D007899:Leisure Activities; D008297:Male; D008875:Middle Aged; D012179:Retirement; D011795:Surveys and Questionnaires; D013663:Teaching; D014495:Universities; D014937:Work