function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Epler, John H.', 1],
    ['Magoga, Giulia & Montagna, Matteo & Marziali, Laura', 1],
    ['Moubayed-Breil, Joel & Lods-Crozet, Brigitte', 1],
    ['Namayandeh, Armin & Bilyj, Bohdan & Beresford, David V.', 1],
    ['Ren, Jing & Lin, Xiaolong & Wang, Xinhua', 12],
    ['Tasdemir, Ayse & Akyildiz, Gurcay Kivanc', 2],
    ['Yamamoto, Nao & Yamamoto, Masaru', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);