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Letter to the Editor
Multiple system atrophy: Inspiratory sighs as a key polysomnographic sign to early diagnosis?
J.N. Caldeiraa,
Corresponding author
joaoncaldeira@gmail.com

Corresponding author.
, J. Moitab, A.C. Brásb,c
a Pulmonology Department, Centro Hospitalar e Universitário de Coimbra, Coimbra 3004-561, Portugal
b Sleep Medicine Center, Centro Hospitalar e Universitário de Coimbra, R. do Museu 2, Coimbra 3045-081, Portugal
c Neurology Department, Centro Hospitalar e Universitário de Coimbra, Coimbra 3004-561, Portugal
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Pulmonology

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