The GUATEMALA-PENN relationship is a partnership that is borne from more than a century of research, service and scholarship. Our goal, with this book and with our programs, is to grow this partnership based upon the reciprocal needs of our Guatemalan stakeholders and the mission of the university. Guatemala is only one country away from the US. Our shared heritage and joint economic and social interests make it critical to foster a strong and mutually beneficial relationship between our two countries. Our connections have evolved over time in response to new knowledge gained about each other. This book is a testament to our collective past, present and future. For more information or to donate visit: http://www.med.upenn.edu/globalhealth/guatemalapartners.shtml