TY  - RPRT
TI  - Variation in surgical rates: a population study.
AU  - I Ruiz
AU  - I Hernandez-Aguado
AU  - P Garrido
PY  - 1998
DO  - 10.1097/00005650-199809000-00004
UR  - https://pubmed.ncbi.nlm.nih.gov/9749655/
ID  - 9749655
ER  -