Background: Psoriasis is a chronic inflammatory skin disease that is estimated to affect 0.6% to 4.8% of the general population. The optimum number of NB-UVB phototherapy sessions is yet to be determined. The aim of this study was to compare therapeutic effects of NB-UVB in treating chronic plaque type psoriasis three times weekly vs. five times weekly. Materials and Methods: This study was des...

This paper proposes a new GARCH-jump in mean model to test the presence of time varying risk premia associated with normal and extreme news events. The model allows for a dynamic jump component with autoregressive jump intensity, long-range dependence in volatility dynamics, and a volatility in mean structure separately for the normal and extreme news events. The results show significant jump r...

This paper describes a planning methodology and tools for a truncated SPRT (sequential probability ratio test) for checking the means ratio of the times between failures (assumed to be exponentially distributed) of two items. The problem is considered for the situation in which the ratio may differ from unity, whereby the results are applicable for any specified ratio, or wherever multiple copi...

BACKGROUND Totally implantable vascular access devices (TIVADs) are accepted as a safe and effective method of facilitating long term intravenous therapy. We report our experience of the use of these devices in children with cystic fibrosis with a particular focus on the incidence and type of complications. METHODS The medical records of patients with cystic fibrosis who underwent placement o...