Supplementary Appendix 1 Investigator Agreement • January 2nd, 2007
Contract Type FiledJanuary 2nd, 2007Supplement to: Calverley PMA, Anderson JA, Celli B, et al. Salmeterol and fluticasone propionate and survival in chronic obstructive pulmonary disease. N Engl J Med 2007;356:775-89.