As I wrap up my year-long sabbatical in Switzerland, during which I was a visitor at ETH Zürich, I am grateful to have been part of the innovative team at the Center for Digital Health Interventions (CDHI). Led by Profs. Elgar Fleisch and Tobias Kowatsch and jointly operated by ETH and the University of St. Gallen, the center is working on a range of important problems, interesting studies, and innovative technologies: passive health-sensing techniques in smartphones, smartwatches, and cars; stress detection; asthmatic cough detection and breathing-exercise games for asthmatics; machine learning to predict when a person might be receptive to health-intervention messages; chat bots to engage and encourage people involved in health interventions; systems to detect hypoglycemia in the driver of a car; passive interventions that can occur while driving; and more.
Although my visit has been scientifically productive and rewarding, it is really the people who have made the visit so delightful. The faculty welcomed me by encouraging and enabling me to be involved wherever I seemed interested; my officemates patiently answered all my questions about Zürich and Switzerland; the graduate students adopted me into their lunchtime group outings; and the staff assisted me with all the complex logistics of moving to, living in, and departing from Switzerland. Just a portion of the team is pictured below. I am proud to have been part of this group for the past year, and hope I can return again some day!
David Kotz 
Thank you David. Not only for the great hikes but also for your guidance to my team and me. I look forward to your next trip to Switzerland. Best Felix
Thank you Dave. I am very grateful for the discussions, your support in the later stages of my doctorate, and all the valuable lessons I could learn from you. I look forward to having you again as a mentor and hiking partner so that we can explore some new research areas in addition to the alpine mountains. Best Filipe
Thanks, dear Dave. Your time with us at the CDHI was a great enrichment for us all. We are already looking forward to your next visit! Sincerely, Elgar
Dear Dave, thank you so much for sharing time and knowledge with us. We hope to meet you again soon.
Kindly, Caterina
Thank you, David! It was a great pleasure having you in the lab! I wish you all the best and I hope you had a pleasant journey home! Although, We haven’t had the chance to exchange too much during the early stages of my Ph.D. I hope we can stay in touch for the future!
Dear Dave, Thank you so much for the time and effort you put into our ongoing collaboration. Let’s proceed and see you soon in the States, Singapore, Switzerland or somewhere else! 👍 With kind regards, Tobias
Thanks Dave! It was nice reconnecting, having you around, and getting your feedback on all our research works.
Thank you dave, it was great meeting you and getting to know you. Looking forward to meeting you in the future.
Dear Dave, thank you so much for your advice, guidance, and the many interesting conversations. I am sure we will meet again. Until then I wish you and your family all the best and a pleasant start back in the States! Gisbert