function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allen, Timothy Field', 1],
    ['Chakrabarty, Tapas & Kumar, Anand & Ghoshal, Partha Pratim', 9],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 3],
    ['De Barros, Rafael C. & Da Fonseca, Mailson G.', 1],
    ['De Kok, Rogier P. J.', 1],
    ['García, Kimberly & Botero, Juan Pablo & Santos-Silva, Antonio', 1],
    ['Groll, Elisa Von', 1],
    ['Heffern, Daniel & Botero, Juan Pablo & Santos-Silva, Antonio', 1],
    ['Kostermans, Andre Joseph Guillaume Henri', 1],
    ['Liu, Bing & Jin, Wei-Yin & Zhao, Li-Na & Yang, Yong', 1],
    ['Perger, Robert & Santos-Silva, Antonio & Guerra, Fernando', 1],
    ['Ramella, Lorenzo & Barriera, Gabrielle', 1],
    ['Santos-Silva, Antonio & Heffern, Daniel & Botero, Juan Pablo', 1],
    ['Teschner, Hans', 1],
    ['Yang, Zhi & Jin, Wei-Yin & Liu, Bing & Ferguson, David Kay', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);