Kahn, Katherine L., <br/><br/>
The effect of comorbidity on appropriateness ratings for two gastrointestinal procedures / 
Katherine L. Kahn [and seven others] ; supported by the U.S. Department of Health and Human Services. 
 - 8 pages ;  28 cm 
 - A Rand note :  N-3373-HHS .
 - Rand note :  N-3373-HHS .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label> Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gallbladder--Surgery.<br/>Cholecystectomy--Utilization. <br/>Medical care--Utilization.