function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Decae, Arthur E. & Schwendinger, Peter J.', 3],
    ['Liu, Hao & Xu, Xin & Zhang, Zengtao & Liu, Fengxing & Li, Daiqin', 5],
    ['Saaristo, Michael I.', 1],
    ['Siliwal, Manju & Kananbala, A. & Bhubaneshwari, M.', 2],
    ['Xu, Xin & Xu, Chen & Liu, Fengxiang & Zhang, Zengtao', 5],
    ['Yang, Zizhong & Xu, Xin', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);