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Article History

Received: 10 June 2016

Accepted: 23 June 2016

First Online: 9 July 2016

Compliance with ethical standards

:

: M. Mahler, E. Mummert and C. Bentow are employed at Inova Diagnostics selling autoantibody assays. Marvin Fritzler received honoraria from Inova Diagnostics.

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study (retrospective) formal consent is not required.

: Informed consent was obtained from all individual participants included in the study.