function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilki, Kamil & Urhan, Raşit & Karaca, Mehmet', 12],
    ['Bulut, Davut Rıza & Urhan, Raşit & Karaca, Mehmet', 9],
    ['Díaz-Aguilar, Irma & Ujvári, Zsolt', 11],
    ['Keçeci, Büşra & Urhan, Raşit & Karaca, Mehmet', 3],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 18],
    ['Lin, Jian-Zhen', 14],
    ['Marchenko, Irina I.', 3],
    ['Moraza, María Lourdes', 2],
    ['Nemati, A. & Gwiazdowicz, D. J. & Riahi, E. & Mohseni, M.', 2],
    ['Nemati, Alireza & Riahi, Elham & Khalili-Moghadam, Arsalan', 2],
    ['Ujvári, Z.', 3],
    ['Ujvári, Zs.', 18],
    ['Ujvári, Zsolt', 42],
    ['Urhan, R.', 3],
    ['Urhan, Raşit & Duran, Elif Hilal', 47],
    ['Other (6)', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=197)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);