Alexander G Elder, Barbara O'Donnell, Elizabeth A B McCruden, Ian S Symington, William F Carman
Elder A G, O'Donnell B, McCruden E A B, Symington I S, Carman W F.
Incidence and recall of influenza in a cohort of Glasgow healthcare workers during the 1993–4 epidemic: results of serum testing and questionnaire
BMJ 1996; 313 :1241
doi:10.1136/bmj.313.7067.1241