Sleep apnoea-hypopnoea syndrome in the obese and non-obese: Clinical, polysomnographical and clinical characteristics Elena Martínez Cuevas; Carmen Muñoz Peláez; Estrella Ordax Carbajo; Ana Isabel Navazo Eguia; Lourdes Martín Viñe; Aranzazu Prieto Jimeno; María Luz Alonso-Álvarez;