function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akba, Melikan & Okuyucu, Cengiz', 20],
    ['Franco, P. & Dahms, H. - U. & Lo, W. - T. & Hwang, J. - S.', 1],
    ['Liu, Chao & Vachard, Daniel & Cózar, Pedro & Coronado, Ismael', 11],
    ['Noble, Paula & Aitchison, Jonathan C. & Danelian, Taniel', 1],
    ['Pioli, Achille', 1],
    ['Topsent, Émile', 2],
    ['Vachard, Daniel & Coze, François Le & Cózar, Pedro', 1],
    ['Vachard, Daniel & Le Coze, François', 1],
    ['Vachard, Daniel & Le Coze, François & Cózar, Pedro', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=39)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);