function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['García, Marta & Pérez, Guillermo & Portillo, Manuel', 6],
    ['Lavigne, Robert J. & Dennis, D. Steve', 1],
    ['Lavigne, Robert J. & Dennis, Steve', 2],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Scarbrough, Aubrey G. & Perez-Gelabert, Daniel E.', 3],
    ['Sinclair, Bradley J.', 1],
    ['Vieira, Rodrigo & Camargo, Alexssandro & Pollet, Marc', 3],
    ['Żóralski, Robert & Kowalczyk, Jan Krzysztof', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);