Test, Trace, and Put on the Blockchain?: A Viewpoint Evaluating the Use of Decentralized Systems for Algorithmic Contact Tracing to Combat a Global Pandemic[J] JMIR PUBLIC HEALTH AND SURVEILLANCE 2021(7) Platt, Moritz Hasselgren, Anton Manuel Roman-Belmonte, Juan de Oliveira, Marcela Tuler De La Corte-Rodriguez, Hortensia Olabarriaga, Silvia Delgado Rodriguez-Merchan, E. Carlos Mackey, Tim Ken