Factors influencing the duration of untreated illness among patients with anorexia nervosa: A multicenter and multi‐informant study. - Gumz, Antje; Reuter, Laurence; Löwe, Bernd; Voderholzer, Ulrich; Schwennen, Bianca; Fehrs, Helge; Wünsch‐Leiteritz, Wally; Brunner, Romuald; Kästner, Denise; Zapf, Antonia; Weigel, Angelika (International Journal of Eating Disorders, 2023)