I've eat 1 -2 days old sandwiches of peanut butter and a lot of other things (ham, chiken, chocolate, cheese...) without problems ;) 15-20 hours is not too much. I think, only raw eeg could be unsafe.
Part of the Smart grid glossary: The International Telecommunication Union (ITU) is an agency of the United Nations (UN) whose purpose is to coordinate telecommunication operations and services throughout the world. Originally founded in 1865, as the International Telegraph Union, the ITU is the oldest existing international organization.
The California State University (Cal State or CSU) is a public university system in California. Composed of 23 campuses and eight off-campus centers enrolling 460,200 students with 24,405 faculty and 23,012 staff, CSU is the largest four-year public university system in the United States.