TY  - RPRT
TI  - Echinacea for the common cold.
AU  - Steve Shober
PY  - 2003
DO  - 10.7326/0003-4819-139-7-200310070-00018
UR  - https://pubmed.ncbi.nlm.nih.gov/14530238/
ID  - 14530238
ER  -