0000950123-04-003550 10-K/A 4 20031231 20040319 REGENERON PHARMACEUTICALS INC 0000872589 2834 133444607 NY 1231 10-K/A 34 000-19034 04680705 777 OLD SAW MILL RIVER RD TARRYTOWN NY 10591-6707 9143477000 10-K/A 1 y94850ke10vkza.htm AMENDMENT NO.1 TO FORM 10-K EX-23.1 3 y94850kexv23w1.htm EX-23.1: CONSENT OF PRICEWATERHOUSECOOPERS LLP EX-31 4 y94850kexv31.htm EX-31: CERTIFICATION OF CEO AND CFO EX-32 5 y94850kexv32.htm EX-32: CERTIFICATION OF CEO AND CFO