Before revision: The principal investigator of Natsal-1, Natsal-2 and Natsal-3 was Anne Johnson, a professor at University College, London, and co-leader Kaye Wellings, a professor at the London School of Hygiene & Tropical Medicine.
After revision: The Principal Investigator of Natsal-1, Natsal-2 and Natsal-3 was Anne Johnson, a professor at University College, London, and co-leader Kaye Wellings, a professor at the London School of Hygiene & Tropical Medicine.