MMA breath test (video) NIH/National Human Genome Research Institute Share Print E-Mail Loading video... Caption Breath test for methylmalonic acidemia measures disease severity and success of liver transplantation for patients. Credit Ernesto del Aguila III, NHGRI Usage Restrictions Please provide appropriate credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.