Citation

Pearn JH, Wong RYK, Brown J, Ching YC, Bart R, Hammar S. Am. J. Public Health 1979; 69(5): 450-454.

Copyright

(Copyright © 1979, American Public Health Association)

DOI

10.2105/AJPH.69.5.450

PMID

unavailable

Abstract

[Abstract unavailable]

Language: en