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D320730 | Ediger et al. | Oct 1991 | |
D341777 | Sheu | Nov 1993 | |
D342880 | Clancy | Jan 1994 | |
D344663 | Balzen | Mar 1994 | |
5203469 | Chang et al. | Apr 1993 | |
5228570 | Robinson | Jul 1993 | |
5284245 | Slivon et al. | Feb 1994 |