Notarized highest education diplomas attained or proof of study.

经过公证的最高学历或在校学习证明。

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"As the art of bariatric surgery has evolved, it's become safer, and this study is proof of that evolution, " he said.

CNN: Weight-loss surgery safe, but sleep apnea increases risk

Karen Addington, chief executive of Juvenile Diabetes Research Foundation, who funded the research said the study provided "proof of principle" of an artificial pancreas.

BBC: Artificial pancreas hope for children with diabetes

Dr Lorenz Studer, head of the Stem Cell and Tumor Biology Laboratory at the centre, and the lead researcher on the study, told BBC News Online that the study was "proof of principle" that cloned embryonic stem cells could be reliably transformed into a variety of useful cell types.

BBC: NEWS | Health | Mouse cloned to cure Parkinson's