TY  - RPRT
TI  - What is transfer factor?
AU  - A A Gottlieb
AU  - L G Foster
AU  - S R Waldman
AU  - M Lopez
PY  - 1973
DO  - 10.1016/s0140-6736(73)90861-1
UR  - https://pubmed.ncbi.nlm.nih.gov/4126619/
ID  - 4126619
ER  -