Two Northern California registered are returning from a medical relief mission to a typhoon-ravaged region of the Philippines, even as more RNs this week left to continue a volunteer effort sponsored by the Registered Nurse Response Network of National Nurses United. Jane Sandoval, an RN community activist who works at St. Luke’s Hospital in San Francisco, returns tonight. Lyn Tirona, a Kaiser Sacramento RN, returned earlier this week. Both spent about two weeks on the ground, mostly on Panay, an island in the direct path of the storm.