Effect of early or delayed insertion of tympanostomy tubes for persistent otitis media on developmental outcomes at the age of three years. - Paradise,J.L.; Feldman,H.M.; Campbell,T.F.; Dollaghan,C.A.; Colborn,D.K.; Bernard,B.S.; Rockette,H.E.; Janosky,J.E.; Pitcairn,D.L.; Sabo,D.L.; Kurs-Lasky,M.; Smith,C.G. (N Engl J Med, 2001)