Citation

Martinez-Novack MC, Ortiz-Ortiz MT, Castañeda-Carbajal B, Alvarado GF. Int. J. Environ. Res. Public Health 2015; 12(9): 11718-11720.

Affiliation

Facultad de Ciencias de la Salud, Escuela de Medicina, Universidad Peruana de Ciencias Aplicadas. pcmegalv@upc.edu.pe.

Copyright

(Copyright © 2015, MDPI: Multidisciplinary Digital Publishing Institute)

DOI

10.3390/ijerph120911718

PMID

26393629

Abstract

We have read and analyzed the article entitled "Prevalence of marijuana use among university students in Bolivia, Colombia, Ecuador and Peru". We propose some objective points which could enhance the internal validity of the study (i.e., we suggest to report participation proportions)...

Language: en