Dame Louise Johnson, a leading molecular biologist and protein crystallographer at the University of Oxford, and Cheng-Wen Wu, who was doing pioneering work on the four-step mechanism of gene transcription at the National Yang-Ming University in Taiwan, both became Vallee Visiting Professors in Bert’s lab at Harvard Medical School.

Moshe Yaniv, a leader in the field of DNA tumor viruses like Polyoma, SV40 and Papilloma at the Institut Pasteur in Paris, spent his Vallee Visiting Professorship in Peter Howley’s lab at Harvard Medical School.