Dear Sirs/Ms: This is MY THIRD REQUEST regarding payment for services (surveys) rendered, including #51681 which was completed on 10/29/19!!! I have not received ANY response and if I don't receive an expeditious response in the next 12 hours will need to assess additional charges for MY time in attempting to receive payment!! Other surveys not yet paid include: #52865 - done 12/12/19; #52667 - done 12/14/19; #52593 - done 12/20/19; and #53283 - done 1/14/20 Ronald Reichman MD RonaldReichmanMD@***.com 310-470-**** private landline 310-709-**** cell/text