function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahad, Sumaya & Ahmad, Wasim', 4],
    ['Ahmad, Wasim', 1],
    ['Ahmad, Wasim & Ahad, Sumaya & Islam, Md. Niraul', 4],
    ['Ahmad, Wasim & Ahad, Sumaya & Sturhan, Dieter', 1],
    ['Ahmad, Wasim & Park, Byeong-Yong & Lee, Jae-Kook & Choi, Dong-Ro', 1],
    ['Bohra, Padma', 3],
    ['Gusakov, Vladimir A. & Gagarin, Vladimir G.', 1],
    ['Holovachov, Oleksandr', 2],
    ['Islam, Md Niraul & Ahmad, Wasim', 20],
    ['Li, Yujuan & Baniyamuddin, M. & Ahmad, Wasim & Wu, Jihua', 4],
    ['Pedram, Majid & Pourjam, Ebrahim & Vinciguerra, Maria T.', 1],
    ['Poiras, Larisa', 1],
    ['Shahina, F. & Nasira, K. & Firoza, K. & Erum, Y. I.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);