Lalloo et al. [1] are to be commended for undertaking further research on methods of auditing the process and outputs of occupational physicians’ reports, which usually take the form of correspondence with referring managers. To supplement their literature search, readers should be aware that your journal has published research regarding this issue in the past and occupational physicians’ repor...

Correspondence to: Dr Xue-Feng Huang, Reproductive Medicine Center, The Affiliated Hospital of Wenzhou Medical College, Wenzhou, Zhejiang 325000, China Fax: +86-5778-8069 ext.393 E-mail: [email protected] Received: 27 March 2010 Accepted: 30 March 2010 Letters to the Editor Asian Journal of Andrology (2010) 12: 447–448 © 2010 AJA, SIMM & SJTU All rights reserved 1008-682X/10 $ 32.00 www.natur...

In April 2004 guidelines were introduced advising that letters to the GP should be copied to parents of young people. A study was carried out to ascertain the views of young people and their parents as to who they felt should receive correspondence after an outpatient appointment.

We show that the marked version of the Post Correspondence Problem, where the words on a list are required to diier in the rst letter, is decidable. On the other hand, we prove that PCP remains undecidable if we only require the words to diier in the rst two letters. Thus we locate the decidability/undecidability-boundary between marked and 2-marked PCP.

We show that the marked version of the Post Correspondence Problem, where the words on a list are required to di er in the rst letter, is decidable. On the other hand, if we only require the words to di er in the rst two letters, the problem remains undecidable. Thus we sharply locate the decidability/undecidability-boundary between marked and 2-marked PCP.

A primitive, aperiodic substitution on d letters has at most d asymptotic orbits; this bound is sharp. Since asymptotic arc components in tiling spaces associated with substitutions are in 1-1 correspondence with asymptotic words, this provides a bound for those as

Aphorismatic literature and private correspondence represent interesting sources to reconstruct the relationship between physician and patient, throwing light on particular aspects of it. The letters, which were written by Maria Teresa of Austria to her sons, appear very interesting from this point of view and contribute to understand the organization of health care system in Austria and in Tus...