Filled in the survey then sent this to the email address quoted at the start:
I believe the last question in your e-cigarette survey is both flawed and misleading.
Vapour from an e-cigarette will only normally contain formaldehyde if it is pushed beyond its design limits/intended wattage range and into a dry hit scenario. Several studies have tried to make this link in the past, usually with the use of a machine designed to test cigarettes and power ranges way beyond the intended use, and have been almost universally discredited for this very reason. As a vaper I can assure you a dry hit is unpleasant and that you sort the problem out before continuing to use the atomizer.
I answered “No” for this reason.