function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Desutter-Grandcolas, Laure & Anso, Jérémy & Jourdan, Hervé', 1],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 1],
    ['Ghahari, H. & Hayat, R. & Tabari, M. & Ostovan, H. & Imani, S.', 1],
    ['Gu, J. X. & Dai, L. & Huang, J. H.', 1],
    ['Hollier, John & Bruckner, Harald & Heads, Sam W.', 1],
    ['Hugel, S.', 5],
    ['Mal, Jhabar & Nagar, Rajendra & Swaminathan, R.', 1],
    ['Tan, Ming Kai & Baroga-Barbecho, Jessica B. & Yap, Sheryl A.', 1],
    ['Yang, C. & Wei, Z. - D. & Liu, T. & Liu, H. - Y.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);