With increased utilization of platelet-rich plasma (PRP), it is important for clinicians to understand the United States, the Food and Drug Administration (FDA) regulatory role and stance on PRP. Blood products such as PRP fall under the prevue of FDA's Center for Biologics Evaluation and Research (CBER). CBER is responsible for regulating human cells, tissues, and cellular and tissue-based pro...

background and aims. a plethora of definitions has been used for periodontitis for epidemiological studies. the aim of this cross-sectional study was to assess the impact of different case definitions on the prevalence of periodontitis and to find the level of agreement among them. materials and methods. periodontal records of 300 subjects were randomly selected from the database of oral health ...

The specifications of automated learning scenarios can lead to advantages for virtual learning environments and important benefits for organizations, although research in this e-learning area has not addressed this issue. To achieve this goal, one requirement is to have an infrastructure able to support the execution of specifications of learning scenarios. This paper presents an open service-o...

We describe a logic language to formally express interdependencies between classes belonging to different schemas, the socalled interschema knowledge. These interdependencies allow a designer of a multidatabase (MDB) to establish relationships between both the intensional definition and the set of instances of classes represented in different schemas. These assertions form the „backbone“ of the...

My discussion will be focussed on the notion of a property. I first present the standard intensional definition of a property, which is formulated in terms of possible worlds, and outline some of the philosophical problems this definition leads to. Then I introduce the notion of a conceptual space and show how such spaces can be used as a basis for a new criterion of what a property is. This cr...