Erratum to: Polysomnographic findings in Rett syndrome: a case-control study.

The article aims to assess at-home portable monitoring (PM) in the elderly for a diagnosis of obstructive sleep apnea syndrome. Discussed in the article is the method employed in the study of patients more than 64 years of age including the utilization of polysomnography (PSG), portable monitoring using Stardust II which is a type 3 portable device, and the scoring procedure for both PM and PSG and its statistical analysis.