From a Wall Street Journal story by Lane Florsheim headlined “America’s Most Famous Neurosurgeon Thinks You Should Take a Nap”:

Years ago, Dr. Sanjay Gupta spent a week keeping a detailed journal of everything he did in a day. Then he reviewed his findings. Mornings were the best time for him to write. Eating pickles gave him bursts of inspiration. “I don’t know what it is,” said Gupta, 54, a neurosurgeon and CNN’s chief medical correspondent. “Something about the way it interacts with my microbiome, perhaps.”