Hollenstein, Michael; Thwaites, Philip; Bütikofer, Simon; Heinrich, Henriette; Sauter, Matthias; Ulmer, Irina; Pohl, Daniel; Ang, Daphne; Eberli, Daniel; Schwizer, Werner; Fried, Michael; Distler, Oliver; Fox, Mark; Misselwitz, Benjamin (2017). Pharyngeal swallowing and oesophageal motility during a solid meal test: a prospective study in healthy volunteers and patients with major motility disorders. Lancet Gastroenterology and Hepatology, 2(9):644-653.
Bütikofer, Simon. Prevalence and risk factors of late presentation for HIV diagnosis and care in a tertiary referral centre in Switzerland. 2014, University of Zurich, Faculty of Medicine.