TY  - RPRT
TI  - Hard to swallow test.
AU  - H J Biem
AU  - A Laupacis
PY  - 1994
DO  - 10.1001/archneur.1994.00540140021006
UR  - https://pubmed.ncbi.nlm.nih.gov/8304834/
ID  - 8304834
ER  -