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Vito Francic, Martin Keppel, Verena Schwetz, Christian Trummer, Marlene Pandis, Valentin Borzan, Martin R Grübler, Nicolas D Verheyen, Marcus E Kleber, Graciela Delgado, Angela P Moissl, Benjamin Dieplinger, Winfried März, Andreas Tomaschitz, Stefan Pilz and Barbara Obermayer-Pietsch

Introduction A broad range of cardiovascular disease (CVD) has been observed to be influenced by seasonal variation. Various parameters, ranging from temperature changes to vitamin D deficiency, have been shown to play a potential role in this

Open access

Göran Oleröd, Lillemor Mattsson Hultén, Ola Hammarsten and Eva Klingberg

to determine if the seasonal variations observed in total 25(OH)D in serum is followed by a concomitant variation in free 25(OH)D or if the variation is damped by alterations in the binding capacity of DBP. We also wanted to compare the concentrations

Open access

Malachi J McKenna, Barbara F Murray, Myra O'Keane and Mark T Kilbane

Introduction Vitamin D supply is changeable, being sourced from skin synthesis following solar exposure, which is curtailed seasonally in high-latitude countries, and from oral intake of natural foodstuffs, fortified foodstuffs and supplements (1

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Suvanjaa Sivalingam, Marianne Thvilum, Thomas Heiberg Brix, Laszlo Hegedüs and Frans Brandt

leucocyte antigens ( 13 ). In line with that, we have previously suggested that infection with Yersinia enterocolitica may increase the risk of GD ( 13 ). As the exposure to infections often follows a seasonal pattern, the observations of seasonal

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Eeva M Ryhänen, Ilkka Heiskanen, Harri Sintonen, Matti J Välimäki, Risto P Roine and Camilla Schalin-Jäntti

did not find any correlation between serum 25OHD and preoperative HRQoL (20) . As seasonal variation can influence HRQoL (32) , we investigated whether this could have influenced our results. We divided the patients into three categories according to

Open access

Shuhui Ma, Zixu Wang, Jing Cao, Yulan Dong and Yaoxing Chen

plays an important role in the circadian and seasonal rhythms, immunomodulation and neurotransmission ( 3 ). In birds, pinealectomy abolished the circadian patterns of locomotor activity and body temperature ( 4 , 5 ), which was attributed to the

Open access

R Perchard, L Magee, A Whatmore, F Ivison, P Murray, A Stevens, M Z Mughal, S Ehtisham, J Campbell, S Ainsworth, M Marshall, M Bone, I Doughty and P E Clayton

seasonality was eliminated with a vitamin D-fortified diet ( 16 ). In a systematic review and meta-analysis conducted by Zipitis and coworkers ( 17 ), the risk of T1D was significantly reduced in individuals who had received cholecalciferol in early infancy

Open access

M Langeveld, C Y Tan, M R Soeters, S Virtue, G K Ambler, L P E Watson, P R Murgatroyd, V K Chatterjee and A Vidal-Puig

seasonal variation of NST, which is known to exist, subjects were studied between April 2012 and September 2012 ( 13 ). All subjects provided written informed consent and the study conformed to the standards set by the latest revision of the Declaration of

Open access

Shenglong Le, Leiting Xu, Moritz Schumann, Na Wu, Timo Törmäkangas, Markku Alén, Sulin Cheng and Petri Wiklund

Tanner stage 1 and 2 were included at the baseline ( 13 , 14 ). Data collection was performed at baseline and after 1, 2, 4 and 7.5 years. In order to avoid seasonal effects, all information was collected and laboratory tests (included the blood sample

Open access

Changwei Liu, Jingwen Wang, Yuanyuan Wan, Xiaona Xia, Jian Pan, Wei Gu and Mei Li

/190). The difference between newly diagnosed T1DM and established T1DM in the deficient and insufficient subgroups was statistically significant (χ 2  = 13.86, P  = 0.00). The seasonal distribution of mean serum vitamin D levels in T1DM and controls is