Respiratory medication use in primary care of four latin american countries: the puma study

Universidade Federal de Sao Paulo, Sao Paulo, BrazilFac Med Sci Santa Casa Sao Paulo, Sao Pablo, BrazilCent Univ Venezuela, Fac Med, Caracas, VenezuelaUniv Comahue, Fac Ciencias Med, Cipolletti, Rio Negro, ArgentinaUniv Republica, Hosp Maciel, Montevideo, UruguayHosp Univ Caracas, Caracas, VenezuelaUniversidade Federal de Sao Paulo, Sao Paulo, BrazilWeb of Scienc