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The article presents an investigation to collect information about dental care habits, attitudes towards dental health and dental status among 20-60 year old individuals in Sweden. It studies the relationship between socioeconomic factors, dental care habits and dental status. The results of the interview indicate that there is a widespread positive attitude to preservation of own teeth and to dental care in Sweden. The results of the clinical examination show that the number of remaining teeth is lower in higher age groups than in younger age. Analysis of correlation demonstrate that age and level of education are correlated to dental status.

Assesses the risk of cancer development among patients with condylomata acuminata at the Karolinska Hospital in Stockholm, Sweden. Prevalence of malignant tumor; Number of expected national incidence; Absence of significant increase in genital cancer; Occurrence of genitourinary cancers in males.

Presents a study that analyzed different measurements setups for a programmable Josephson voltage standard. Arrays and measurement setups; Results of the study; Conclusion.

Examines the effects of imprinting as a mechanism contributing to opiate addiction in adults in Stockholm, Sweden. Rate of mortality associated with opiate addiction; Administration of opiates, barbiturates and nitrous oxide to mothers during labor; Conclusions that imprinting is a causative mechanism for drug addiction.

Graphene quantum Hall effect (QHE) resistance standards have the potential to provide superior realizations of three key units in the new International System of Units (SI): the ohm, the ampere, and the kilogram (Kibble Balance). However, these prospects require different resistance values than practically achievable in single graphene devices (~12.9 kΩ), and they need bias currents two orders of magnitude higher than typical breakdown currents I C  ~ 100 μA. Here we present experiments on quantization accuracy of a 236-element quantum Hall array (QHA), demonstrating R K /236 ≈ 109 Ω with 0.2 part-per-billion (nΩ/Ω) accuracy with I C  ≥ 5 mA (~1 nΩ/Ω accuracy for I C  = 8.5 mA), using epitaxial graphene on silicon carbide (epigraphene). The array accuracy, comparable to the most precise universality tests of QHE, together with the scalability and reliability of this approach, pave the road for wider use of graphene in the new SI and beyond., (© 2022. The Author(s).)

To further elucidate the etiology of spontaneous pneumothorax (SP), a study was made of three nonsmoking patients who had experienced several episodes of chest radiograph-verified familial SP (FSP) and 11 unaffected relatives, 5 of whom were smokers and 6 of whom were never-smokers. Fourteen healthy subjects without SP served as a control group. All three groups underwent the same clinical, laboratory, and radiologic examinations, including CT scans of the lungs, with the aim of detecting any changes in the pulmonary parenchyma. Emphysema-like changes (ELCs) were detected on CT scans in each of the three patients with FSP. The unaffected relatives of the FSP patients showed no sign of FSP, but four of the six never-smokers and three of the five relatives who were smokers displayed pulmonary emphysema and ELCs on CT scans. No abnormalities were seen on pulmonary CT scans of the 14 control subjects. The present results indicate that ELCs and pulmonary emphysema may be genetically determined.