TY  - JOUR
PY  - 2015//
TI  - Comments on Hynes et al. Prevalence of marijuana use among university students in Bolivia, Colombia, Ecuador and Peru. Int. J. Environ. Res. Public Health 2015, 12, 5233-5240
JO  - International journal of environmental research and public health
A1  - Martinez-Novack, Maria Claudia
A1  - Ortiz-Ortiz, Maria Teresa
A1  - Castañeda-Carbajal, Bruno
A1  - Alvarado, German F.
SP  - 11718
EP  - 11720
VL  - 12
IS  - 9
N2  - 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)...<p />  <p>Language: en</p>
LA  - en
SN  - 1661-7827
UR  - http://dx.doi.org/10.3390/ijerph120911718
ID  - ref1
ER  -