function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ashrafi, Hossein & Dehghani, Amir & Sari, Alireza', 1],
    ['Bruce, A. J.', 1],
    ['Li, Xinzheng', 1],
    ['Li, Xinzheng & Bruce, Alexander J.', 4],
    ['Li, Xinzheng & Cleva, Régis & Poupin, Joseph', 2],
    ['Li, Xinzheng & Poupin, Joseph', 1],
    ['Mitsuhashi, Masako & Takeda, Masatsune', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);