function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bayartogtokh, Badamdorj', 3],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 4],
    ['Chatterjee, Tapas & Pfingstl, Tobias & Pešić, Vladimir', 18],
    ['Colloff, Matthew J.', 8],
    ['Koch, C. L.', 18],
    ['Liu, Dong & Zhang, Zhi-Qiang', 4],
    ['Mahunka, S.', 19],
    ['Niedbała, W.', 6],
    ['Niedbała, Wojciech', 53],
    ['Niedbała, Wojciech & Liu, Dong', 3],
    ['Parry, B. W.', 4],
    ['Ryabinin, Nikolay A. & Liu, Dong & Gao, Meixiang & Wu, Dong-Hui', 38],
    ['Weigmann, G. & Miko, L.', 15],
    ['Willmann, C.', 6],
    ['van der Hammen, L.', 19],
    ['Other (20)', 31]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=249)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);