References

Acromegaly 
Editorial discussing diagnosis of acromegaly
Acromegaly Consensus Group guidelines for acromegaly management
How to diagnose acromegaly
Latest consensus guidance on defining cure of acromegaly
Addison’s disease
Annals of Clinical biochemistry report on the investigation of suspected Addison’s disease
How to diagnose Addison's disease
Adrenal incidentalomas
American Association of Clinical Endocrinologists guidelines
How to diagnose adrenal incidentalomas
Conn's syndrome
The Endocrine Society clinical practice guidelines on the diagnosis of Conn's syndrome
Cushing's syndrome
The Endocrine Society clinical practice guidelines on the diagnosis of Cushing’s syndrome
New medical therapies for Cushing's disease
How to diagnose Cushing's syndrome
Graves' disease
EUGOGO guidelines on Graves' ophthalmopathy
Growth hormone deficiency
NICE guidelines on GH replacement
Short stature medical forum
How to diagnose growth hormone deficiency
Hypothyroidism
Consensus statement on treatment of hypothyroidism
How to diagnose hypothyroidism
Insulinoma
Endocrine Society clinical practice guideline on the management of hypoglycaemia
How to diagnose insulinoma
Non functioning pituitary tumours
Guidelines on the management of incidental pituitary lesions
Phaeochromocytoma
How to diagnose phaeochromocytoma
Polycystic ovarian syndrome
Androgen excess and PCOS society task force for PCOS
Revised Rotterdam guidelines on PCOS
American Association of Clinical Endocrinologists guidelines on PCOS
Low dose dexamethasone suppression testing in the evaluation of hyperandrogenism
How to diagnose polycystic ovarian syndrome
Prolactinoma
Latest guidance on investigation and treatment of hyperprolactinaemia
MHRA warning on the use of dopamine agonists
How to diagnose prolactinoma
Thyrotoxicosis and multinodular goitre
Royal College of Physician guidelines on the use of radioactive iodine
Thyroid disease in pregnancy guidelines
How to diagnose thyrotoxicosis
How to diagnose multinodular goitre
Thyroid nodules
American Association of Clinical Endocrinologists guidelines on the management of thyroid nodules
British Thyroid Association guidelines on the management of thyroid cancer
How to diagnose thyroid nodules
Obesity
NICE guidance on the management of obesity
How to diagnose obesity
Osteoporosis
Scottish intercollegiate guidelines network SIGN guide to the management of osteoporosis
NICE guidance on the management of osteoporosis
How to diagnose osteoporosis
Other useful documents
Carbimazole warning sheet
Addison's disease self help group emergency sheet
Ferriman Gallwey score
Epworth sleepiness scale
AGHDA questionnaire
FRAX fracture risk assessment tool
Patient support groups
Other references   
All the investigation protocols and accompanying patient information sheets have been adapted from those in use at the Norfolk and Norwich University Hospitals Foundation Trust. These were developed in collaboration with Sondra Gorick, senior endocrine specialist nurse, and all the medical and nursing staff of the endocrinology department.
These protocols have been modified in various ways over years of clinical experience and with valuable patient feedback. However, the original sources are listed below:
Barth JH, Butler GE and Hammond P (2001) Biochemical Investigations in Laboratory Medicine, ACB Venture Publications.
Turner HE, Wass JH (2002) Oxford Handbook of Endocrinology and Diabetes, Oxford University Press.
PJ Trainer and GM Besser (1995) The Barts Endocrine Protocols, Churchill Livingstone.