Aly Tohamy, MD1,2, Margo Klomp, MD, PhD1, Hein Putter, MD, PhD3,
Amr Youssef, MD, PhD2, Hamdy Shams-Eddin, MD, PhD2,
Mahmoud Abdelsabour, MD, PhD2, M. J. Schalij, MD, PhD1,
and J. Wouter Jukema, MD, PhD1