function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cleva, Régis & Crosnier, Alain', 1],
    ['Jiang, Guo-Chen & Chan, Tin-Yam & Shih, Tung-Wei', 3],
    ['Landeira, José María & Lozano-Soldevilla, Fernando', 1],
    ['Li, Xinzheng', 5],
    ['Viana, Girlene Fábia Segundo & Ramos-Porto, Marilena', 2],
    ['Yang, Chien-Hui & Chan, Tin-Yam & Chu, Ka Hou', 2],
    ['Yang, Chien-Hui & Kumar, Appukuttannair Biju & Chan, Tin-Yam', 1],
    ['Yang, Chien-hui & Chan, Tin-Yam & Kumar, Appukuttannair Biju', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);