All experts who participated in the development of World Health Organization guidelines: use of cryotherapy for cervical intraepithelial neoplasia, were required to complete the WHO Declaration of Interests form. Out of all the experts who participated in this work, three experts declared an interest in the subject related to cervical cancer prevention, as follows:

Dr Lynette Denny: from 2006 to 2010, she has spoken on HPV vaccination at various speaker's fora organized by the companies MSD and GSK. The total honorarium received by Dr Denny from both companies combined was approximately US$ 3000 per year."

Dr Swee Chong Queck: over the past four years, he has participated in medical advisory boards and speakers' bureaux relating to cervical cancer prevention strategies, HPV vaccine efficacy studies and clinical relevance of HPV vaccination for the prevention of cervical cancer and other HPV related diseases. The total income received by Dr Queck from both companies combined was approximately 5000 Singapore dollars per year over the past four years.

Dr Vivien Tsu: her employer PATH, an international nonproft organization operating in the field of health, has received large-scale donations of HPV vaccines and test kits, as well as equipment, for use in demonstration projects aimed at promoting public health, including in particular in low-resource countries.