what clinical trials did they conduct?
They tested many other drugs that were not approved.
Icos
Icos tested many other drugs that were not approved. 
what is icos? It was an American biotechnology company. where exactly was it located? U.S. state of Washington when was it founded? 1989 who founded it? David Blech, Isaac Blech, Robert Nowinski, and George Rathmann what drugs were manufactured there? Drugs to treat inflammatory disorders, antibodies, tadalafil, LeukArrest ect did some company file a lawsuit against them? Yes, Pfizer what was the reason for that? Pfizer was given a broad patent on PDE5 inhibitors.
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Icos [SEP] Other drugs tested in clinical trials
Icos tested many other drugs that were not approved. They are: