@article{articlea7214446,
title   = {Spot urine porphyrins/creatinine ratio profile of healthy brazilian individuals adjusted for personal habits},
author = {Alves, A. N. L and Sumita, N. M and Burattini, Marcelo Nascimento and Della Rosa, Henrique Vicente},
year = {2009},
doi = {10.1590/s0100-879x2009005000002},
journal   = {Brazilian Journal of Medical and Biological Research}
}