function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Benedetto, J.', 1],
    ['Hansen, Jesper & Holmer, Lars E.', 15],
    ['Skovsted, C. B. & Knight, I. & Balthasar, U. & Boyce, W. D.', 1],
    ['Streng, Michael & Holmer, Lars Erik', 7],
    ['Zhang, Zhiliang & Holmer, Lars E. & Chen, Feiyang', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);