No impact on the incidence rate of adenoidectomy 1998-2014 on a national level in Denmark by the use of nasal steroid and the introduction of pneumococcal vaccines. - Grønlund C; Howitz MF; Djurhuus BD (Clinical otolaryngology : official journal of ENT-UK ; official journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery, 2020)