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Article History

Received: 4 July 2019

Accepted: 29 October 2019

First Online: 15 November 2019

Ethics approval and consent to participate

: All human studies have been approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.Lead ethic committee approval by MHH (Medizinische Hochschule Hannover) – reference # 7773_BO_K_2018 (dated 14.02.2018) – each individual hospital requested ethic approval at the responsible local committees – on the basis of the lead ethic committee approval.Retrospective data collection approach based on anonymized data (no informed consent was necessary).

: Not applicable

: WM: Prof. Miesbach reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, personal fees from Shir, outside the submitted work.JM: Prof. Menne reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, personal fees from Sanofi Genzyme, personal fees from Alexion, outside the submitted work.MB: Dr. Bommer reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, personal fees from Sanofi, personal fees from Alexion, outside the submitted work.US: Dr. Schönermarck reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, personal fees from Alexion, outside the submitted work.TF: Prof. Feldkamp reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, personal fees from Akari, personal fees from Alexion, outside the submitted work.MN: Dr. Nitschke reports personal fees from Alexion, outside the submitted work.TW: Prof. Westhoff has nothing to disclose.FS: Dr. Seibert has nothing to disclose.RW: Prof. Woitas has nothing to disclose.RS: Dr. Sousa reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, outside the submitted work.MW: Mr. Wolf reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, outside the submitted work.SW: Dr. Walzer reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, outside the submitted work.BS: Mr. Schwander reports personal fees from Ablynx a Sanofi Company, during the conduct of the study; personal fees from Ablynx a Sanofi Company, outside the submitted work.