title: A new twist in approaching difficult tracheal intubation. Description of an economic, easy, and effective way: the sigma way.
authors: Luca
authors: L
authors: La Colla
authors: Giorgio
authors: G
authors: La Colla
authors: Davide
authors: D
authors: Poli
authors: Andrea
authors: A
authors: Albertin
mesh_terms: D006801:Humans; D007442:Intubation, Intratracheal / Q000191:economics / Q000379:methods*