The following investigators participated in the study:
Executive Committee — E. Abu-Assi, Spain; S. Raposeiras-Roubín, Spain.
Scientific Advisory Committee — J. Saucedo (Chair), USA; F. D´Ascenzo, Italy; J
Henriques, The Netherlands.
Principal Investigators — J.R. González-Juanatey, Spain; I. Nuñez-Gil, Spain; A. Ariza-Sole, Spain; W.J. Kikkert, The Netherlands; S. Kedev, Macedonia; D. Alexopoulos, Greece; C. Liebetrau, Germany; Z. Huczek, Poland; C. Moretti; Italy; S. Wilton, Canada; L.C. Correia, Brazil; T. Kawaji, Japan; Toshiharu Fujii, Japan; M. Kawashiri, Japan; S.P. Nie, China; X. Wang, China.
Co-investigators — J.M. García-Acuña, Spain; E. Alfonso, Spain; B. Terol, Spain; A. Garay, Spain; O. Kalpak, Macedonia; I. Xanthopoulou, Greece; N. Osman, Germany; H. Möllmann, Germany; M. Kowara, Poland; K.J. Filipiak, Poland; F. Giordana, Italy; S. Scarano, Italy; D. Southern, Canada; Y. Ikari, Japan; T. Nakahayshi, Japan; K. Sakata, Japan; M. Yamagishi, Japan; D. Zhang, China; Yalei Chen, China; X. Song, China; Y. Yan, China; J.Y. Fan, China.