Repeatable access blood flow (ABF) measurement.

@article{Ilstrup1984RepeatableAB,
  title={Repeatable access blood flow (ABF) measurement.},
  author={K M Ilstrup and Allan J. Collins and Gordon L. Hanson and Prakash R. Keshaviah},
  journal={Transactions - American Society for Artificial Internal Organs},
  year={1984},
  volume={30},
  pages={338-41}
}