The AACR offers an unparalleled range of conferences for cancer scientists.

美国癌症研究学会提供了一个无与伦比的癌症科学家会议。

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Serving as both the country's vice president and foreign minister, Maduro often was seen in the front row of Chavez's news conferences and traveled to Cuba many times alongside Chavez as he underwent cancer treatment.

CNN: Maduro: From bus driver to Venezuelan leader

Serving as both the country's vice president and foreign minister, he often was seen in the front row of Chavez's press conferences and traveled to Cuba many times alongside Chavez as he underwent cancer treatment.

CNN: Venezuela's interim leader thrust into spotlight