We thank the residents of Asembo and Gem, community leaders,and health facilities staff whose interest, support, and cooperationmade this study possible. Community residents, particularlythe nyamrerwa (traditional birth attendants), village monitors,and other field staff provided the essential network for collectionof the data presented in these papers. Without their hard work,and that of other members of the study team, including laboratorypersonnel, data entry clerks, clinical officers, drivers, theatergroup members, network support staff, and administrative supportstaff, this project could not have succeeded. Many individualsserved in key supervisory roles, including Michael Onyango,George Olang, Richard Odhiambo, George Okoth, Helen Nyanjage,Millicent Atieno, Maurice Ombok, Richard Otieno, Caleb Ouma,Polycap Obel, James Kwach, Thomas Ondieki, David Anyona (deceased),Michael Othim, and Jane Oiro. Critical administrative supportwas provided by Pauline Abdallah, Benta Kamire, Lucy Atieno,Ben Wafula, Austin Otieno, Jeremy Watkins-Pitchford, and ChristiMurray. Essential computer support was provided by Tony Ojwangand Winston Olwande. The American Embassy in Nairobi and theKenya Medical Research Institute (KEMRI) provided essentiallogistical and administrative support. We thank, in particular,the Director of KEMRI, Dr. Davy Koech, for his many years ofsupport, and the former American Ambassador to Kenya, Ms. PrudenceBushnell, for her interest and enthusiasm, which did not flageven during difficult times. We are very grateful to Dr AggreyOloo for his assistance, advice, and support. We appreciatethe contributions made by the Ministry of Health, particularlythe former Provincial Medical Officer, Nyanza Province, Dr.Richard Muga, and our colleagues from the Malaria Control Programme.We thank Dr. Juliana Otieno for her advice and support. KevinDeCock, Larry Slutsker, and Rick Steketee provided helpful adviceon many early versions of these papers. Remaining errors are,of course, ours. On the other side of the ocean, Sue Binderand Dan Colley of the Division of Parasitic Diseases at theCenters for Disease Control and Prevention were especially supportive.At the United States Agency for International Development (USAID),we thank John Paul Clark, Mary Ettling, Neen Alrutz, DennisCarroll, Victor Masbayi, and Gary Newton for their support andencouragement. Students from many different institutions, bothwithin and outside of Kenya, participated at different stagesof the project; we are grateful for their assistance and hopethey benefited from the experience. Major financial supportwas provided by the USAID, with additional support from theSpecial Health Fund of the Royal Netherlands Embassy in Nairobi,and the Netherlands Foundation for the Advancement of TropicalResearch (WOTRO).