Table:
HIV/AIDS
Other names	HIV disease, HIV infection[1][2]

The red ribbon is a symbol for solidarity with HIV-positive people and those living with AIDS.[3]
Specialty	Infectious disease
Symptoms	Early: Flu-like illness[4]
Later: Large lymph nodes, fever, weight loss[4]
Complications	Opportunistic infections, tumors[4]
Duration	Lifelong[4]
Causes	Human immunodeficiency virus (HIV)[4]
Risk factors	Exposure to blood, breast milk, sex[4]
Diagnostic method	Blood tests[4]
Prevention	Safe sex, needle exchange, male circumcision, pre-exposure prophylaxis, post-exposure prophylaxis[4]
Treatment	Antiretroviral therapy[4]
Prognosis	Near normal life expectancy with treatment[5][6]
11 years life expectancy without treatment[7]
Frequency	1.8 million new cases (2016)[8]
36.7 million living with HIV (2016)[8]
Deaths	1.0 million (2016)[8]

Return the merged cell regions in the provided table image. Your answer should be in the JSON format of {'top-left':(x, y), 'bottom-right':(z, w)}, where (x, y) and (z, w) represent the (row_id, column_id) coordinates of top-left cell and bottom-right cell, respectively. Note that row_id and column_id start from 1 instead of 0.

The merged cell region is: {'top-left':(1, 1), 'bottom-right':(1, 2)}.