"Thank you! Remember, even if he doesn't want to answer the questions he needs to let me know so I can take him off the list."

She starts working her way through the rest of the names.

She can get a couple people to answer her questions and one to say "I didn't give you my number! Don't call me!"

The former get "Thank you very much!" and the latter gets "My apologies, I won't contact you again." Now, what response percentage is she looking at, if you count partial responses and clear expressions of non-consent as responding?

She's gotten 85%.

Hmm. That might be enough for the Council, but she has one more tactic to try first. She calls Dr. James the next time her office is open.

"Dr. James, hello?"

"Hello, it's Margaret Peregrine again, with the research? I hope this is an okay time. I'm looking for help finding people's addresses so I can ask them the Council's follow-up questions. How do people in the Avalon find each other?"

"Generally by already being acquainted, or mutual friends. It's not very systematic, it's a small town."

"Hmmm, and I don't want to go asking around for people by name, because of patient confidentiality. If you had someone's name and email and needed to find them, would you have any better ideas than 'walking around the Avalon until you ran into them'? Are there events lots of people go to?"

"There's church? Why are you asking me?"

"Because you've been helpful before. Thanks, I won't take up any more of your time."

She also remembers some of the Avalon-dwelling patients had wanted house calls. She goes through her email archives to see if any of the non-responders already gave her their addresses.

Some of them did!

A-ha! The next evening she will go to the Avalon and knock on doors like an annoying proselytizer. But for science! And healing! And jumping through bureaucratic hoops, but whatever, finding out if anybody had side effects really is important.

This gets her one of her remaining holdouts, and one no-answer, and one grandpa who can't quite hear her.

The no-answer gets their address written down to be pestered again later; the grandpa gets asked with careful enunciation if she can speak with his descendant so-and-so. 

"What's all this about? Who are you?" says the grandpa.

She repeats the descendant's name a couple more times, and reminds herself that she should start designing a de-aging spell.

"He's not home."

"Okay. Goodbye!" That's two for the pester-again-later pile, but for now she can go home and collate results. Has anyone reported anything resembling a negative side effect? Or, for that matter, an unexpected positive or neutral one?

One person is not sure whether needing to have a filling redone had anything to do with it or not.

That's pretty reasonable, since she isn't sure either. This is probably enough to bring to the Council; do they have a phone number or a website where one can make appointments?

They have a phone number. The person who answers gives her a time slot eight days out.

Cool, that gives her enough time to send all the remaining holdouts another round or two of email and also knock on those two house calls' doors again.

The one whose grandpa was there is home this time! "- what?"

"Hi! Remember when you tried that healing magic a few weeks ago? The Council wants some information on how well it worked. Can I ask you a few questions?"