Head-of-bed elevation outcomes on apnea severity nasal resistance in
obstructive sleep apnea: a multicenter observational study
Antonino Maniaci1 · Mario Lentini1 · Jerome R. Lechien · Giannicola Iannella · Manuele Casale · Antonio Moffa · Stefano Pelucchi · Alberto Caranti · Kenny P. Pang · Brian Rotenberg · Claudio Vicini