ElderGHSmithSGSmythJane S. Laboratory investigation of the porphyrias. Ann Clin Biochem1990; 27: 395–412
2.
LimCKPetersTJ. Urine and faecal porphyrin profiles by reversed-phase high-performance liquid chromatography in the porphyrias. Clin Chim Acta1984; 139: 55–63
3.
HendersonMJ. Thin-layer of free porphyrins for the diagnosis of porphyria. Clin Chem1989; 35: 1043–4
4.
DeaconAC. Performance of screening tests for porphyria. Ann Clin Biochem1988; 25: 392–7
5.
ZuijderhoudtFMJDorresteijn-DeBok JTe VeldeK. Evaluation of a first-line spectrophotometric screening test for increased urine porphyrin excretion. Ann Clin Biochem1995; 32: 186–9
6.
CassonSEElderGH. An external quality assessment scheme for urinary porphyrin and porphobilingen [Poster presentation]Wembley: ICCC, 1996