Heat and moisture exchangers as a treatment option in the post-operative rehabilitation of laryngectomized patients. - Ackerstaff,A.H.; Hilgers,F.JM.; Aaronson,N.K.; de Boer,M.F.; Meeuwis,C.A.; Knegt,P.PM.; Spoelstra,H.AA.; van Zandwijk,N.; Balm,A.JM. (Clin Otolaryngol, 1995)