He has co-authored several books, lectures internationally, and has been placed on advisory boards of several health and wellness companies. Dr. Jeff, combined with our creative team, possess the knowledge and expertise required to ensure we continue to grow as innovators in the air purification industry. Dr. Bennert has been working with Dr. Ghosh for the last five years studying the reduction of aeroallergens and allergic rhinitis using air purifiers and they have published more than 10 articles jointly.