Letters to the Editor

Marshall SM , Barth JH . Standardization of HbA_1c measurements: a consensus statement. Ann Clin Biochem 2000; 37: 45–6

John WG . Glycated haemoglobin analysis. Ann Clin Biochem 1997; 34: 17–31

Kobold U , Jeppsson JO , Dulffer T , Finke A , Hoelzel W , Miedema K. Candidate reference methods for haemoglobin A_1c based on peptide mapping. Clin Chem 1997; 43: 1944–51

Welsh External Quality Assurance Scheme report for GHb distributions 41 and 44 (1999)

Thomas MA , Davies KW . Standardisation of HbA_1c, current performance in the UK [abstract]. Clin Chem Lab Med 1999; 37: T327

Twomey P. New antiepileptic drugs. Ann Clin Biochem 1999; 36: 785

Patsalos PN . New antiepileptic drugs. Ann Clin Biochem 1999; 36: 10–9

Tomson T , Johannessen SI . Therapeutic monitoring of the new antiepileptic drugs. Eur J Clin Pharmacol 2000; 55: 697–705

Morris RG , Black AB , Harris AL , Batty AB , Sallustio BC . Lamotrigine and therapeutic drug monitoring: retrospective survey following the introduction of a routine service. Brit J Clin Pharmacol 1998; 46: 547–51

Fröscher W , Keller F , Kramer G , Vogt H. Serum level monitoring in assessing lamotrigine efficacy and toxicity. Epilepsia 1999; 40 (suppl 2): 252

Besag FM , Craven P , Berry DJ , Pool F , Aylett S. The role of blood-level monitoring in assessing lamotrigine toxicity. Epilepsia 1999; 39 (suppl 6): 131

Werz MA , Reed RC . Tolerability and efficacy of very high dose lamotrigine: Clinical experience. Epilepsia 1999; 40 (suppl 7): 77

Chadwick D. Overuse of monitoring of blood concentrations of antiepileptic drugs. BMJ 1987; 294: 723–4

Schoenenberger RA , Tanasijevic MJ , Jha A , Bates DW . Appropriateness of antiepileptic drug level monitoring. JAMA 1995; 274: 1622–6

Commission on Antiepileptic Drugs. Epilepsia 1993; 34: 585–7

Davies JS , Ogunko A , Smith J , Russell D , John R , Scanlon MF . Diagnostic dilemmas in Cushing's syndrome. Ann clin Biochem 2000; 37: 85–9

Tsuboi Y , Ishikawa SE , Fujisawa G , Okada K , Saito T. Possible pre-Cushing's syndrome due to an adrenal adenoma incidentally discovered. Endocrine J 1995; 42: 509–16

Bardet Z , Rohmer V , Murat A , Guillemot C , Marechaud R , Chupin M , West of France study group on incidentalomas. Clin Endocrinol 1996; 44: 587–96

Hensen J , Buhl M , Oelkers W. The functional spectrum of adrenocortical adenomas. Med Hypotheses 1993; 40: 217–22

McLoed MK , Thompson NW , Gross MD , Bondeson A-G , Bondeson L. Sub-clinical Cushing's syndrome is patients with adrenal gland incidentalomas: Pitfalls in diagnosis and management. Am Surgeon 1990; 56: 398–403

Burke CW . The pituitary megatest. Clin Endocrinol 1992; 36: 133–4

Bangar V , Clayton RN . How reliable is the short Synacthen test for the investigation of the HPA axis? Eur J Endocrinol 1998; 139: 580–3