function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Federica, Semprucci & Maria, Balsamo', 6],
    ['Gagarin, V. G.', 2],
    ['Jia, Susu & Huang, Yong', 1],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 6],
    ['Leduc, Daniel & Zhao, Zeng Qi', 4],
    ['Leduc, Daniel & Zhao, Zeng Qi & Sinniger, Frederic', 1],
    ['Martelli, Antonela & Russo, Virginia Lo & Villares, Gabriela', 4],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 2],
    ['Shimada, Daisuke & Takeda, Naoya & Tsune, Akira', 2],
    ['Tchesunov, Alexei V. & Thanh, Nguyen Vu & Tu, Nguyen Dinh', 6],
    ['Wen, Guo & Huixin, Liang & Mengna, Wang & Chunming, Wang', 2],
    ['Zaragoza-Caballero, Santiago & Rodríguez-Mirón, Geovanni M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);