Automated telecommunication to obtain longitudinal follow-up in a multicenter cross-sectional COPD study.
Stewart JI, Moyle S, Criner GJ, Wilson C, Tanner R, Bowler RP, Crapo JD, Zeldin RK, Make BJ, Regan EA. Automated telecommunication to obtain longitudinal follow-up in a multicenter cross-sectional COPD study. COPD. 2012 Aug; 9(5):466-72.