LONDON - Oil prices slid Tuesday but held above $41 after OPEC confirmed an April meeting of key crude producing nations against a backdrop of excess supplies. Around 1230 GMT on Friday, US benchmark West Texas Intermediate (WTI) for delivery in May was down 47 cents at $41.05 a barrel.Brent North Sea crude for May delivery shed 30 cents to $41.24 a barrel compared with Monday's close. OPEC's secretary-general Abdalla El-Badri said in Vienna on Monday that 15-16 nations would hold talks on output caps in Doha on April 17, but he did not know whether Iran would join, Bloomberg News reported.