Cell-free DNA donor fraction analysis in pediatric and adult heart transplant patients by multiplexed allele-specific quantitative PCR: Validation of a rapid and highly sensitive c... oleh Paula E North, Emily Ziegler, Donna K Mahnke, Karl D Stamm, Angela Thomm, Paul Daft, Mary Goetsch, Huan Ling Liang, Maria Angeles Baker, Adam Vepraskas, Chris Rosenau, Mahua Dasgupta, Pippa Simpson, Michael E Mitchell, Aoy Tomita-Mitchell