I am learning English and can't fully understand the sentence:
Freezing and rewarming sections of heart tissue successfully raises hopes for doing the same for the entire organ.
The question is to what words relates "successfully"?
Should I understand the sentence as "(Freezing and rewarming sections of heart tissue successfully) raises hopes for doing the same for the entire organ." or "Freezing and rewarming sections of heart tissue (successfully raises hopes for doing the same for the entire organ)."
P.S. The sentence is from The Guardian article (caption of the first figure).