Schulz R, Beach SR, Lind B, Martire LM, Zdaniuk B, Hirsch C, Jackson S, Burton L. Involvement in caregiving and adjustment to death of a spouse: findings from the caregiver health effects study. JAMA. 2001  ;285(24):3123-9.

Steffens DC, Chung H, K Krishnan RR, Longstreth WT, Carlson M, Burke GL. Antidepressant treatment and worsening white matter on serial cranial magnetic resonance imaging in the elderly: the Cardiovascular Health Study. Stroke. 2008  ;39(3):857-62.