"Clinical Chemistry and Laboratory Medicine", 28.12 (1990): 873-956. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/cclm.1990.28.issue-12/issue-files/cclm.1990.28.issue-12.xml

Clinical Chemistry and Laboratory Medicine (1990), 28(12), pp. 873-956. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/cclm.1990.28.issue-12/issue-files/cclm.1990.28.issue-12.xml

Clinical Chemistry and Laboratory Medicine. 1990. 28(12): 873-956. Retrieved 20 Jun. 2013, from http://www.degruyter.com/view/j/cclm.1990.28.issue-12/issue-files/cclm.1990.28.issue-12.xml