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To the Editor.
—Dr Des Jarlais and colleagues1 gave an excellent analysis of factors crucial in maintaining a stable, low human immunodeficiency virus (HIV) prevalence in injecting drug users (IDUs) in five cities. We describe here our situation and experiences in Hong Kong for comparison.
TWO NEW changes in childhood immunization are imminent: extension of the acellular pertussis component in the diphtheria and tetanus toxoids and pertussis (DTP) vaccine to the first three doses given at 2,4, and 6 months of age, and the advent of a new and highly potent vaccine against hepatitis...
—We appreciate the thoughtful comments by Drs Winett and Kalichman and by Drs Branson, Moore, and Byers regarding methodological issues relevant to our article.
One concern is the participation rate. Given that one recruitment strategy was distributing flyers throughout the target...
To the Editor.
—The article by Dr Kimmel and colleagues1 provides important information on the relationship between percutaneous transluminal coronary angioplasty (PTCA) procedure volume and major complications. However, it is important to clarify the comparison the authors made with our study...
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