Stubig, T.
Aidarous, H.
Khalifa, A.
Omar, M.
Krettek, C.
Omar Pacha, T.
Article History
Received: 1 November 2019
First Online: 1 April 2020
Compliance with ethical standards
:
: Each author certifies that he or she has no commercial associations (e.g., consultancies, stock ownership, equity interest, patent/licensing arrangements, etc.) that might pose a conflict of interest in connection with the submitted article.