TY  - RPRT
TI  - Looking for the obvious.
AU  - Kelvin K L Chong
AU  - Wai-Man Chan
DO  - 10.1016/s0140-6736(05)66876-6
UR  - https://pubmed.ncbi.nlm.nih.gov/16005343/
ID  - 16005343
ER  -