Morris J.N, Berg K., Fries B.E, Steel K., Howard E.P.  2013.  Scaling functional status within the interRAI suite of assessment instruments. BMC Geriatr. 13:128.

Lou VWQ, Chi I, Kwan CWai, Leung AYM.  2013.  Trajectories of social engagement and depressive symptoms among long-term care facility residents in Hong Kong. Age and Ageing. 42(2):215-22.