function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Crespo, Luis C. & Boieiro, Mario & Cardoso, Pedro', 2],
    ['Dean, David Allen', 3],
    ['Gao, Cai-Xia & Li, Shu-Qiang', 2],
    ['Isaia, Marco & Paschetta, Mauro & Chiarle, Alberto', 1],
    ['Naumova, Maria & Blagoev, Gergin & Deltshev, Christo', 1],
    ['Santanna, Manoela & Rodrigues, Everton Nei Lopes', 10],
    ['Smith, Helen M. & Vink, Cor J. & Fitzgerald, Brian M.', 6],
    ['Vink, Cor J. & Dupérré, Nadine & Paquin, Pierre', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);