2007-5057 2007-5057 S2007-50572019000100009 10.22201/facmed.20075057e.2019.29.18162 Estados Unidos Estados Unidos 00 03 2019 00 03 2019 8 29 9 12 1 2016 50 5 5 560-1 2 2017 41 1 1 149-53 3 2013 310 21 21 2245-6 4 2016 4th ed 5 United States Medical Licensing Examination 2018