function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Drechsler-Santos, Elisandro Ricardo & Robledo, Gerardo Lucio', 1],
    ['Gomes-Silva, Allyne Christina & Ryvarden, Leif', 3],
    ['Jarvis, Charlie', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 4],
    ['Regio, Nicolas do Carmo & Palacio, Melissa', 1],
    ['Vlasák, Josef & Vlasák, Josef', 1],
    ['Yang, Lu Wang Xin & Zhao, Changlin', 1],
    ['Zhu, Lin & Ji, Xing & Si, Jing & Cui, Bao-Kai', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=13)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);