function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arabuli, Lela & Murvanidze, Lali & Faltynkova, Anna', 1],
    ['Chauhan, B. S.', 1],
    ['Hafeezullah, M.', 1],
    ['Hussain, Syed Altaf & Hanumantha Rao, K. & Shyamasundari, K.', 1],
    ['Liu, S. F.', 2],
    ['Looss, A.', 1],
    ['Nagaty, H. F. & Abdel Aal, Tahia M.', 1],
    ['Pan, Jin-Pei', 1],
    ['Ramadan, M. M.', 1],
    ['Slusarski, Wieslaw', 1],
    ['Tang, Zhong-zhang', 1],
    ['Yamaguti, S.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);