function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Artal, Pedro & Hyžný, Matúš', 1],
    ['Barnard, J. Laurens', 1],
    ['Bousquet, Yves', 1],
    ['Bruzelius, Ragnar M.', 1],
    ['Calman, W. T.', 1],
    ['D\'Acoz, Cédric D\'Udekem & Degrave, Sammy', 3],
    ['Gan, Zhibin & Li, Xinzheng', 1],
    ['Low, Martyn E. Y. & Ng, Peter K. L. & Clark, Paul F.', 1],
    ['Macpherson, Enrique & Segonzac, Michel', 1],
    ['Published, First', 1],
    ['Suklom, Anotai & Danaisawadi, Patchara & Wongkamhaeng, Koraon', 1],
    ['Timms, Brian', 1],
    ['Wicksten, Mary K.', 2],
    ['Xu, Peng & Li, Xin-Zheng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);