Thank you to everyone who joined in this helpful Question & Answer session in November of last year with Dr. Katerina Vezyroglou on her research work. As promised, we have included the link to the recorded zoom session for those of you who were unable to attend the event. We hope you find this helpful and as in the session, Dr. Vezyrouglou is very happy to hear from anyone who would like to ask any more questions. All questions are welcome. As discussed in the zoom chat, this project also feeds into the OBSERV AHC natural history study involving many international centers.