TY  - RPRT
TI  - Penicillin at the beginning.
AU  - G J Fraenkel
PY  - 1998
DO  - 10.1016/s1092-9134(98)80043-9
UR  - https://pubmed.ncbi.nlm.nih.gov/9930577/
ID  - 9930577
ER  -