New drug development by United States pharmaceutical firms: With analyses of trends in the acquisition and origin of drug candidates, 1963-1979*
1982 ◽
Vol 32
(4)
◽
pp. 407-417
◽
Keyword(s):
New Drug
◽
1996 ◽
Vol 30
(3)
◽
pp. 745-751
◽
1988 ◽
Vol 43
(3)
◽
pp. 290-301
◽
1994 ◽
Vol 55
(6)
◽
pp. 609-622
◽
1991 ◽
Vol 50
(5/1)
◽
pp. 471-486
◽
2001 ◽
Vol 69
(5)
◽
pp. 286-296
◽
1994 ◽
Vol 19
(2)
◽
pp. 228-235
◽
1983 ◽
Vol 33
(6)
◽
pp. 691-700
◽