Good luck with your apps! I asked a current student and formatted it like they did ... headings : philosophy (1 page) why anesthesia (1 page) why Pitt (1/2 page) and future career goals (1/2 page)...
They did tell us that in the first interview... if we checked enough boxes we'd know right away which makes me think they maybe already called 5-10 people who might just not be