Leveraging a health information exchange for analyses of COVID-19 outcomes including an example application using smoking history and mortality. oleh Guillermo A Tortolero, Michael R Brown, Shreela V Sharma, Marcia C de Oliveira Otto, Jose-Miguel Yamal, David Aguilar, Matt D Gunther, Dania I Mofleh, Rachel D Harris, Jemima C John, Paul S de Vries, Ryan Ramphul, Dritana Marko Serbo, Jennifer Kiger, Deborah Banerjee, Nick Bonvino, Angela Merchant, Warren Clifford, Jenny Mikhail, Hua Xu, Robert E Murphy, Qiang Wei, Farhaan S Vahidy, Alanna C Morrison, Eric Boerwinkle