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In 2015 , Gilead Sciences warned health care providers about people that began taking the hepatitis C drugs ledipasvir / sofosbuvir or sofosbuvir along with amiodarone , who developed abnormally slow heartbeats or died of cardiac arrest .
 Gilead Sciences, cardiac arrest
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Gilead Sciences, cardiac arrest