Answer
who: 24 blind patients
what: the treatment of blindness using stem cells
population of interest: those with Stargardt's disease or dry age-related macular degeneration
Work Step by Step
the who of this situation would be the people that are involved in the situation, therefore providing us with this data. The data that we are given is in regards to the treatment of blindness using stem cells, so that would be our what. As for the population of interest, it would be who benefits the most from the data collect, which would be those who have Stargardt's disease or dry age-related macular degeneration.