function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ascher, John S. & Soh, Zestin W. W. & Chui, Shao Xiong', 1],
    ['Boustani, Mira & Rasmont, Pierre & Dathe, Holger H.', 10],
    ['El-Hawagry, Magdi S. & Sharaf, Mostafa R. & Al Dhafer, Hathal M.', 1],
    ['Engel, Michael S.', 2],
    ['I, Eritrea', 15],
    ['Leijs, Remko & Batley, Michael & Hogendoorn, Katja', 14],
    ['Leijs, Remko & Dorey, James & Hogendoorn, Katja', 22],
    ['Lhomme, Patrick', 6],
    ['M. S', 3],
    ['Risch, Stephan & Roberts, Stuart P. M. & Smit, Jan', 1],
    ['Straka, Jakub & Batelka, Jan & Pauly, Alain', 2],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Zakardjian, Marie & Jourdan, Herve & Cochenille, Thomas', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=79)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);