function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Landry, Bernard', 9],
    ['Landry, Bernard & Schmitz, Patrick', 1],
    ['Mbata, Keith J. & Prins, Jurate De', 2],
    ['Pohl, Greg & Anweiler, Gary & Schmidt, Christian', 2],
    ['Ponomarenko, M. G.', 3],
    ['Richert, Arnold & Busse, Rainer & Theimer, Franz', 1],
    ['Schmitz, Patrick & Landry, Bernard', 2],
    ['Wang, Shuxia & Xu, Zhixin', 108]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=128)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);