[1] Auckland City Hosp, Dept Gen Med, Auckland, New Zealand
[2] Auckland City Hosp, Dept Neurol, Auckland, New Zealand
[3] Auckland City Hosp, Dept Gen Med, Auckland, New Zealand
[4] Auckland City Hosp, Dept Liaison Psychiat, Auckland, New Zealand
[5] Duke Univ, Med Ctr, Div Internal Med, Durham, NC USA
[6] Duke Univ, Med Ctr, Div Psychiat, Durham, NC USA