A Venn diagram is simple if at most two curves intersect at any given point. A recent paper of Griggs, Killian, and Savage [Elec. J. Combinatorics, Research Paper 2, 2004] shows how to construct rotationally symmetric Venn diagrams for any prime number of curves. However, the resulting diagrams contain only ( n bn/2c ) intersection points, whereas a simple Venn diagram contains 2n − 2 intersect...

Editors’ Note: In reference to “Low-frequency stimulation of STN-DBS reduces aspiration and freezing of gait in patients with PD,” Dr. Sidiropoulos suggests several avenues of further investigation including low-frequency stimulation to treat dysarthria, the effects of different stimulation location and parameters, and the duration of clinical benefit. Authors Xie et al. respond. Drs. Lattanzi ...

Editors’ Note: In WriteClick this week, Dr. Muth recalls his elective experience at Moi Teaching Hospital in Kenya and expresses the importance of collaboration and partnerships between hospitals in resource-rich and resource-poor countries for the benefit of both students and patients. Discussion ensues among Drs. Romigi et al. and authors Silvestri et al. and St. Louis et al. regarding the mo...

Over the past three decades there has been further modifications and improvement to the technique. A guidewire dilator forceps to create a stoma was described in 1990 [5]. Fantoni described a translaryngeal technique where stomal dilation was obtained from inside [6]. A screw like dilator is used to slowly twist and dilate the stoma in Percu-Twist technique. The Griggs, Fantoni and Percu-Twist ...

Editors’ Note: Commenting on “A puzzling case of amnesia” by Bereznyakova et al., Harriott and Tatum entertain an alternate diagnosis. Senior author Laforce responds. Stagnaro suggests that results in “Growth hormone treatment for childhood short stature and risk of stroke in early adulthood” should have been more specific in detailing that cardiovascular disease (CVD) was observed only in thos...

We consider a common generalization of the embedding and intersection problems for latin squares. Specifically, we extend the definition of embedding to squares whose sides do not meet the necessary condition for embedding and extend the intersection problem to squares of different orders. Results are given for arbitrary latin squares, and those which are idempotent and idempotent symmetric. Th...