Kosta G. Kostov

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To investigate the roles of metabolic and nonmetabolic factors in human muscle fatigue, two relatively brief nonexhausting exercise protocols that produced similar levels of moderate fatigue were used: short-duration exercise (SDE; 2-min sustained maximal voluntary contraction) and long-duration exercise (LDE; 15- to 20-min intermittent exercise). After(More)
The selectivity of different kinds of electrodes for recording of single motor unit potentials was theoretically evaluated. A new type of selective "branched", superficial and subcutaneous wire electrodes was described. The discharge of single alpha motoneurons during movements against elastic resistance was investigated studying motor unit potentials in m.(More)
OBJECTIVES Short-course therapy has been advocated for the treatment of community-acquired pneumonia (CAP). We compared the efficacy and safety of 5 and 7 day courses of gemifloxacin for outpatient treatment of mild-moderate CAP. PATIENTS AND METHODS In a multicentre, double-blind, parallel group study, patients were randomized to receive 320 mg of oral(More)
OBJECTIVES It is still debated if pre-existing minority drug-resistant HIV-1 variants (MVs) affect the virological outcomes of first-line NNRTI-containing ART. METHODS This Europe-wide case-control study included ART-naive subjects infected with drug-susceptible HIV-1 as revealed by population sequencing, who achieved virological suppression on first-line(More)
Background.  Although human immunodeficiency virus (HIV)-positive persons on antiretroviral therapy (ART) frequently have chronic liver enzyme elevation (cLEE), the underlying cause is often unclear. Methods.  Data Collection on Adverse Events of Anti-HIV Drugs (D:A:D) Study participants without chronic viral hepatitis were observed to the earliest of cLEE(More)