Editorial: Precision medicine: biomarker testing for diagnosis and treatment of cardiovascular disease - Hendrianus Hendrianus; Hendrianus Hendrianus; Eliano Navasere; Diana Gorog; Diana Gorog; Paul A. Gurbel; Sang-Wook Kim; Sang-Wook Kim; Young-Hoon Jeong; Young-Hoon Jeong (Frontiers in Medicine)