function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Desutter-Grandcolas, Laure', 7],
    ['Gorochov, Andrej V. & Tan, Ming Kai', 1],
    ['Hollier, John & Bruckner, Harald & Heads, Sam W.', 2],
    ['Hugel, Sylvain & Warren, Ben H. & Desutter-Grandcolas, Laure', 4],
    ['Tan, Ming Kai & Abdul Wahab, Rodzay bin Haji', 1],
    ['Tan, Ming Kai & Gorochov, Andrei V.', 3],
    ['Tan, Ming Kai & Rahmadi, Cahyo & Robillard, Tony', 8],
    ['Tan, Ming Kai & Salvador, Jewel Anne G. & Sabang, Aira Mae M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);