McLean, R R <br/><br/>
Elderly cohort study subjects unable to return for follow-up have lower bone mass than those who can return.  [electronic resource] 

 -  American journal of epidemiology  Apr 2000 
 - 689-92 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0002-9262 
<br/><br/><label>Standard No.: </label>10.1093/oxfordjournals.aje.a010263  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Bias<br/>Bone Density<br/>Calcaneus--diagnostic imaging<br/>Female<br/>Follow-Up Studies<br/>Humans<br/>Male<br/>Massachusetts--epidemiology<br/>Office Visits<br/>Osteoporosis--diagnostic imaging<br/>Ultrasonography