function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilqees, Fatima Mujib', 1],
    ['Cristofaro, R. & Guimaraes, J. F.', 1],
    ['Gu, Chang-dong & Shen, J. - w.', 4],
    ['Khan, A. & Bilqees, Fatima Mujib', 1],
    ['Li, Q. - k. & Zhang, R. - s. & Qiu, Z. - z.', 1],
    ['Linton, E.', 1],
    ['Looss, A.', 1],
    ['Nahhas, Fuad M. & Powell, Edwin C.', 1],
    ['Nicoll, W.', 1],
    ['Oshmarin, P. G.', 1],
    ['Shen, J. - w.', 2],
    ['Siddiqi, Ather H. & Hafeezullah, M.', 1],
    ['Tubangui, Marcos A. & Masiluñgan, Victoria A.', 1],
    ['Yamaguti, S.', 4],
    ['Zaidi, Daulat Ali & Khan, Daler', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);