Scholes D, LaCroix AZ, Wagner EH, Grothaus LC, Hecht JA. Tracking progress toward national health objectives in the elderly: what do restricted activity days signify? Am J Public Health. 1991 Apr;81(4):485-8.
Scholes D, LaCroix AZ, Wagner EH, Grothaus LC, Hecht JA. Tracking progress toward national health objectives in the elderly: what do restricted activity days signify? Am J Public Health. 1991 Apr;81(4):485-8.