Response by Waissi et al Regarding Article, "Elevated Lp(a) (Lipoprotein[a]) Levels Increase Risk of 30-Day Major Adverse Cardiovascular Events in Patients Following Carotid Endarterectomy". Issue 2 (February 2021) - Waissi, Farahnaz; de Kleijn, Dominique P.V.; Kroon, Jeffrey