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5 million in the first quarter of 2003. The increase is primarily due to costs associated with the U. S.commercial launch of Cialis. Total revenue was $16. 5 million in the first quarter of 2004, compared to $7. 1 million in the first quarter of 2003. Collaboration revenue from affiliates (cost reimbursement revenue) totaled $14. 1 million in the first quarter of 2004, compared to $5. 3 million in the first quarter of 2003. The increase reflects $12. 0 million of higher cost reimbursement revenue from Lilly ICOS, primarily due to reimbursement of costs associated with our sales force promoting Cialis in the U. S. Cost reimbursement revenue in 2003 included amounts associated with our terminated Pafase(R) and endothelin receptor antagonist programs. generic viagra tab pfizer viagra purchase online cialis c o is viagra prescribed