outside the range of variation for human microcephalic skulls. However, a 2013 comparison of the LB1 endocast to a set of 100 normocephalic and 17 microcephalic endocasts showed that there is a wide variation in microcephalic brain shape ratios and that in these ratios the group as such is not clearly distinct from normocephalics. The LB1 brain shape nevertheless aligns slightly better with the microcephalic sample, with the shape at the extreme edge of the normocephalic group. A 2016 pathological analysis of LB1's skull revealed no pathologies nor evidence of microcephaly, and concluded that LB1 is a separate species. Laron syndrome A 2007 study postulated that the skeletons were those of humans who suffered from Laron syndrome, which was first reported in 1966, and is most common in inbreeding populations, which may have been the scenario on the small island. It causes a short stature and small skull, and many conditions seen in Laron syndrome patients are also exhibited in H. floresiensis. The estimated height of LB1 is at the lower end of the average for afflicted human women, but the endocranial volume is much smaller than anything exhibited in Laron syndrome patients. DNA analysis would be required to support this theory. Congenital iodine deficiency syndrome In 2008 Australian researcher Peter Obendorf—who studies congenital iodine deficiency syndrome—and colleagues suggested that LB1 and LB6 suffered from myxoedematous (ME) congenital iodine deficiency syndrome resulting from congenital hypothyroidism (underactive thyroid), and that they were part of an affected population of H. sapiens on the island. Congenital iodine deficiency syndrome, caused by iodine deficiency, is expressed by small bodies and reduced brain size (but ME causes less motor and mental disablement than other forms of congenital iodine deficiency syndrome), and is a form of dwarfism still found in the local Indonesian population. They said that various features of H. floresiensis are diagnostic characteristics, such as enlarged pituitary fossa, unusually straight and untwisted humeral heads, relatively thick limbs, double rooted premolar, and primitive wrist morphology. However, Falk's scans of LB1's pituitary fossa show that it is not larger than usual. Also, in 2009, anthropologists Colin Groves and Catharine FitzGerald compared the Flores bones with those of ten people who had had cretinism, and found no overlap. Obendorf and colleagues rejected Groves and FitzGerald's argument the following year. A 2012 study similar to Groves and FitzGeralds' also found no evidence of congenital iodine deficiency syndrome. Down