Upon completion of the research study the original data will be cut into pieces, placed in a sealable bag which can be tightly tied, fill the bag with water and then transfer the bag to a waste container. Blood tests and materials used in this regard will be given to Nepal Red Cross Society. Data stored outside research establishments will be retrieved. Two independent data files; one file with analyzable data excluding sensitive information and another file with farmers' sensitive information linking to their study identification number and scanned copies of informed consents will be stored in Nepal for up to five years. Potential permission to store data in Denmark will be seeked from the Danish Data Protection Agency. Upon approval data will be sent to the Danish Data Archive for indefinite storage time with data documentation. The condition for data access to the Danish Data Archive is that only the principal investigator will have access to the data and full control of giving permission for sharing data with others in the future. If sharing of data occurs the new researcher will have to seek approval from the Danish Data Protection Agency and then consult the Danish Data Archive.