Effects of Donor and Recipient Genetic Expression on Heart, Lung, Liver, or Kidney Transplant Survival

Inclusion Criteria for all participants: * Received single lung, heart, kidney, or liver transplant * Specimens of donor tissues have been collected * Parent or guardian willing to provide informed consent, if applicable Inclusion Criteria for Kidney or Liver Transplant Participants: * 70 years old or younger Inclusion Criteria for Heart or Lung Transplant Participants: * Between 16 and 70 years old Exclusion Criteria for All Participants: * Previous solid organ transplant * Need for combined organ transplant * HIV or hepatitis C virus infection * Recipient of an organ from a hepatitis C virus-infected donor * Clinical evidence of systemic bacterial infection in the recipient at the time of transplantation * Living donor transplant recipient of either a kidney, liver, or lung