function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['An, Jianmei & Li, Xinzheng', 2],
    ['Boury-Esnault, Nicole & Bellan, Gerard & Bellan-Santini, Denise', 1],
    ['C. B. Cameron & C. Deland & T. H. Bullock', 5],
    ['Cameron, C. B. & Perez, M.', 4],
    ['Cameron, Christopher B. & Ostiguy, Angélica', 5],
    ['Deland, C. & Cameron, C. B. & Rao, K. P. & Ritter, W. E.', 17],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 2],
    ['Holland, Nicholas D. & Jones, William J. & Ellena, Jacob', 2],
    ['Miyamoto, Norio & Saito, Yasunori', 1],
    ['Schimkewitsch, W. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=40)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);