Solid (concrete) evidence needs both cement and sand.
Basler
Michael
M
Daniel
Malcolm
M
D000319:Adrenergic beta-Antagonists / Q000627:therapeutic use*; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D017408:Guidelines as Topic; D006801:Humans; D007431:Intraoperative Complications / Q000517:prevention & control*
D000319:Adrenergic beta-Antagonists