TY  - RPRT
TI  - Introduction, epidemiology and classification.
AU  - Robert J Summerlee
AU  - Catherine F Decker
DO  - 10.1016/j.disamonth.2006.09.004
UR  - https://pubmed.ncbi.nlm.nih.gov/17157612/
ID  - 17157612
ER  -