Fürniss, Tilman; Furniss, Tilman; Furniss, Tilman; Furniss, Tilman; Müller, Jörg M.; Achtergarde, Sandra; Winkel, Sandra; Wessing, Ida; Averbeck-Holocher, Marlies; Holocher, Marlies Averbeck-; Averbeck, Marlies; Holocher, Marlies Averbeck-; Averbeck, Marlies; Holocher, Marlies Averbeck-; Averbeck, Marlies; Holocher, Marlies Averbeck-; Averbeck, Marlies; Postert, Christian: Implementing psychiatric day treatment for infants, toddlers, preschoolers and their families: a study from a clinical and organizational perspective