We've been running a longitudinal self-reported diagnosis, conditions, and risk exposure study. There are many challenges in this [0, 1], but plan to keep collecting into the foreseeable future. Currently operating on a global scale, but could be targeted to a specific geographic region.. - M ([email protected])

[0] https://www.bmj.com/content/351/bmj.h3480.full [1] https://bmjopen.bmj.com/content/1/2/e000234