TY  - RPRT
TI  - [Practical aspects regarding sample size in clinical research].
AU  - B Vega Ramos
AU  - O Peraza Yanes
AU  - G Herrera Correa
AU  - S Saldívar Toraya
UR  - https://pubmed.ncbi.nlm.nih.gov/9102749/
ID  - 9102749
ER  -