American Journal of Pathology

1990. V. 137 1/5,2/5,3/5,4/5,5/5,6/6

          V. 136 1/5,2/5,3/5,4/5,5/4,6/6

1989. V. 135 1/5,2/4,3/4,4/4,5/4

          V. 134 1/5,2/5,3/5,4/5,5/3,6/5