TY  - RPRT
TI  - "When do I start?"; "what do I start with?"; and "when should I switch?".
AU  - J Laurence
PY  - 1997
DO  - 10.1089/apc.1997.11.121
UR  - https://pubmed.ncbi.nlm.nih.gov/11361784/
ID  - 11361784
ER  -