TY  - BOOK
AU  - Ayala,Carlos
AU  - Spellberg,Brad
TI  - Boards and wards for USMLE step 2
SN  - 9781496349897
PY  - 2018///], ©2018
CY  - Philadelphia
PB  - Wolters Kluwer
KW  - Clinical medicine
KW  - Examination Question
N1  - Includes bibliographical references and index
ER  -