Hi Dr., my name is Zaida Rios, Sergio Rios daughter. Yo met him back in tha 80’s when my dad eent to germany.... he is having dinner right now with me and my husband and he was telling us about his great memories and friends back in germany... and he told me that you where a very good friend of him but that he disnt have your contact sinxe then... so i asked him for your name and google it.. and afortunately i found you!!! This is my dads mail and he will be very happy to know about you and to stay in touch after all this years... riosarizpesergio@gmail.com