Author Contributions:Study concept and design: Lee and Pham. Acquisition of data: Kartono, Lee, Lanum, and Pham. Analysis and interpretation of data: Kartono, Lee, Lanum, and Maibach. Drafting of the manuscript: Kartono, Lee, and Lanum. Critical revision of the manuscript for important intellectual content: Kartono, Lee, Lanum, Pham, and Maibach. Administrative, technical, and material support: Lanum. Study supervision: Lee, Lanum, and Maibach.