function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Achterberg, C. van', 2],
    ['Broad, Gavin R. & Shaw, Mark R. & Godfray, H. Charles J.', 2],
    ['Ghahari, H. & Fischer, M. & K. J & O. C & Beyarslan, A.', 1],
    ['Madl, M. & Achterberg, C. Van', 1],
    ['Nees von Esenbeck, C. G.', 25],
    ['Samin, Najmeh & Ghahari, Hassan & S, Neveen & Monaem, R.', 1],
    ['Sharkey, Michael J. & Janzen, Daniel H.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);