function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Day, F.', 1],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 3],
    ['Fowler, Henry Weed & Steinitz, H.', 1],
    ['Fu, T. - Y. & Ye, M. - R.', 1],
    ['Huang, S. - Y.', 2],
    ['Kessler, K. T.', 7],
    ['Lloyd, R. E.', 1],
    ['Lohberger, K.', 1],
    ['McClelland, J.', 4],
    ['Mirza, M. R. & Awan, A. A.', 1],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 3],
    ['Terashima, A.', 2],
    ['Wang, Y. - H. & Zhuang, D. - D. & Zhang, K. - X. & Gao, L. - C.', 2],
    ['Yang, Jian & Chen, Xiaoyong & Yang, Junxing', 4],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 11],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);