Thanks everyone. ChoccieMuffin - I've passed this thread to our publishing team, who were really interested. They said they'd keep this info for next time they update our hair loss publication (it's only just been updated) but will also look at what they can put online before then.
If anyone who has donated their hair would be interested in talking about their experience for our Vita magazine, the editor, Laura, would be keen to hear from you, so email her on firstname.lastname@example.org.
Thanks June22 for sharing your research.