... [2] Jessie Hawkins, Colby Baker et all- Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis of randomized, controlled clinical trials, 2018
... [2] Jessie Hawkins, Colby Baker et all- Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis of randomized, controlled clinical trials, 2018