Ayala, Carlos, <br/><br/>
Boards and wards for USMLE step 2 / 
Carlos Ayala, Brad Spellberg. 
 - Sixth edition. 
 - xviii, 685 pages :  illustrations ;  20 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781496349897  RM221.05 149634989X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clinical medicine.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Examination Question.