Tuan Anh Ha Nguyen

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OBJECTIVE Lack of representative data about hidden groups, like men who have sex with men (MSM), hinders an evidence-based response to the HIV epidemics. Respondent-driven sampling (RDS) was developed to overcome sampling challenges in studies of populations like MSM for which sampling frames are absent. Internet-based RDS (webRDS) can potentially(More)
BACKGROUND An estimated 120,000 HIV-associated cryptococcal meningitis (CM) cases occur each year in South and Southeast Asia; early treatment may improve outcomes. The World Health Organization (WHO) recently recommended screening HIV-infected adults with CD4<100 cells/mm(3) for serum cryptococcal antigen (CrAg), a marker of early cryptococcal infection,(More)
BACKGROUND Mean duration of recent infection (MDRI) and misclassification of long-term HIV-1 infections, as proportion false recent (PFR), are critical parameters for laboratory-based assays for estimating HIV-1 incidence. Recent review of the data by us and others indicated that MDRI of LAg-Avidity EIA estimated previously required recalibration. We(More)
BACKGROUND The clinical presentation of Bordetella pertussis can overlap with that of respiratory syncytial virus (RSV); however, management differs. HYPOTHESIS First, the prevalence of B. pertussis is less than 2% among patients screened for RSV, and second the prevalence of B. parapertussis is also less than 2% among these patients. METHODS Nasal(More)
BACKGROUND AND OBJECTIVES The Communication Assessment Tool (CAT), developed by Makoul et al assesses patient perceptions of physicians' interpersonal and communication skills. The objective of this study was to gather initial benchmarking data for the use of the CAT in family medicine residency programs. METHODS Data were collected from patients seeing(More)
BACKGROUND Poultry production cluster (PPC) programs are key strategies in many Asian countries to engage small commercial poultry producers in high-value production chains and to control infectious poultry diseases. This study assessed the multiple impacts of PPCs through a transdisciplinary ecohealth approach in four Asian countries, and drew the(More)
Online game is one of the most successful business on the Internet. As online game business grows, cheating in game becomes popular and is the biggest challenge of online game systems. In this paper, we investigate the application of anomaly detection techniques to cheating detection in an online game (JX2) of VNG company. A method to evaluate the(More)
Many online communities such as Q&A sites, crowd-funding platforms, and online charities are based on users requesting from one another and receiving responses from within the community; the success of these requests is critical to the success of the community. In this paper, we explore the various factors that influence success. One of the most interesting(More)
Objective: To determine whether it is the direction of the needle bevel, J-tip guidewire, or both that influences the direction of the guidewire in subclavian central line placement. Methods: A total of 1,200 trials were performed using a plastic tubular model simulating the subclavian, IJV, and SCV junction. The trials were divided into six groups: needle(More)
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