Colleagues convinced Penson to give Provenge a try in clinical trials, and he was impressed.
Widdop scored the match-winning try in the club's under-20 side's grand final victory last season.
Martin Corry added a late try in injury time on his 250th club appearance.
But despite being a man down, Murphy charged over for another Irish try in injury-time.
Sean Long scored a try in each half and finished with 22 points in total.
"We gave it a try in neurons and it worked the first time, " said Dr. Boyden.
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Andy Farrell's try in the corner seemed to have sealed victory but Yachvili's long-range effort won it.
Warwick fired over his second penalty before Ulster stunned the Limerick faithful with another try in injury-time.
The Sharks had been in Quins' 22 just once before their first try in the 26th minute.
He also won three Lions caps, scoring a try in the first Test win over Australia in 2001.
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Horgan's second try in the 63rd minute put Leinster firmly in control again, although Nacewa missed the conversion.
After a scoreless first quarter, Leinster were awarded a penalty try in the 26th minute, which Sexton converted.
Leeds secured a vital bonus point following a Juan Gomez try in the 27th minute, converted by Ceiron Thomas.
The former England centre defended his team's World Cup record of just one try in the past two games.
Danielli pierced the home defence for the second try in the 23rd minute.
Keith Wood's men swiftly regained the initiative with centre Rob Henderson storming over for a try in the corner.
Wakefield then grabbed a consolation try in the dying seconds, which Veivers converted.
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Scrum-half Boss scored his side's crucial try in the 69th minute, but Nacewa was again off-target with the conversion.
Leicester's Dan Hipkiss scored a consolation try in the final after the favourites had built up a 21-0 lead.
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The scrum-half prevented what seemed a certain Ospreys try in the first half, then scored himself in the second.
They got a third try in the 67th minute when a cracking break was finished by powerful Aussie Rocky Elsom.
Farrell missed the difficult conversion but Britain grabbed their second try in four minutes following a horrendous error by Swann.
Eagles prop Mike MacDonald made the score 13-8 with a try in the corner but Tonga responded through Joseph Vaka.
Tommy Bowe could face his former side while Scotland wing Nikki Walker scored a fine try in Dublin last week.
Murphy punished some a dreadful attempt of a tackle by Carr to score Munster's opening try in the 20th minute.
Coughlan scrambled over between the posts for Munster's sixth try in the closing minutes, O'Gara completing his 100% record from six conversion kicks.
Tommy Bowe raced over for the Ospreys' first try in the 19th minute, with Dan Biggar converting to make it 7-0.
With the Fijians still reeling, Tate added a second try in the corner five minutes later after being released out wide.
Stephenson scored a try in last weekend's victory and will play his third consecutive game for Bath at Murrayfield on Saturday.
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