PT - JOURNAL ARTICLE AU - Salvatore Mangione TI - You can observe a lot by watching AID - 10.3949/ccjm.86a.19056 DP - 2019 Jul 01 TA - Cleveland Clinic Journal of Medicine PG - 440--442 VI - 86 IP - 7 4099 - http://www.ccjm.org/content/86/7/440.short 4100 - http://www.ccjm.org/content/86/7/440.full SO - Cleve Clin J Med2019 Jul 01; 86