Dear all, thank you for your comments. Constanza, thank you for the tips and encouragement. Klaus, your project sounds very interesting. We are also developing a system for easily keeping track of what research participants are eating via a mobile phone app, to improve research related to food. the system is in use in Switzerland and we are looking for researchers in other countries who would like to use it - Sweden is a possibility. I will send you an email! Best wishes, Talia