function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bazzi, Gaia & Galimberti, Andrea & Foglini, Claudio', 3],
    ['Dijkstra, Klaas-Douwe B. & Kipping, Jens & Mézière, Nicolas', 1],
    ['Ghahari, H. & Thipaksorn, A. & Naderian, H. & Sakenin, H. & A. A', 3],
    ['Gonzalez Soriano, Enrique & Noguera, Felipe', 1],
    ['Grand, Daniel & Marinov, Milen & Jourdan, Herve & Cook, Carl', 3],
    ['Hagen, H.', 2],
    ['Hagen, Hermann August Dr.', 1],
    ['K. J. Morton', 3],
    ['Kirby, W. F.', 1],
    ['Legrand, Jean', 2],
    ['Lieftinck, M. A.', 2],
    ['Malikova, E. I. & Chistyakov, Yu. A.', 1],
    ['Martin, R.', 2],
    ['Thoma, Marco & Althaus, Sarah', 2],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 3],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);