Table 2. Types of phase 1 clinical trials in which cases and controls were included.

Variables	n (%)
Intracellular signaling pathway inhibitors	77 (43)
Angiogenesis inhibitors	35 (19)
Cytotoxics	28 (15)
Immunotherapy	24 (13)
Hormonal therapy	9 (5)
Other*	9 (5)

* Other refers to trials of: HDAC inhibitors, cell adhesion inhibitors.